They decided that it does not make much sense. You are *not* logged in to something remote. Your wallets are *only* configured on your local browser. You can delete the wallet, which would be something like a sign out. Eternl has an optional locking with an additional password, Typhon has an optional log out requiring spending password to get back in, Flint has mandatory locking by a PIN and Gero has mandatory locking by spending password. But they all – including Yoroi – require the spending password every time you do a transaction. So, everything that is “protected” there is the view of your wallets – more or less publicly visible on the blockchain, anyway.

Flint is okay. What I personally don't like are the PIN protection, the too short wallet names, the ADA exchange rate graph on the front page (I don't trade much and care only from time to time, it also seems to be USD only, I'd need EUR), the decision if it thinks something is a token or a collectible/NFT. Also, it seems to think that my wallet is not delegated, although it definitely is (Flint even shows the rewards).

Hard forks are not a quarterly event, but irregular larger updates to the protocol. They can be timed arbitrarily. But IOG will only propose them after the new software is thoroughly tested and installed by enough mainnet pools.

Yes, your whole wallet is automatically staked to the same pool that you selected. (Technically, the stake address is encoded in all the addresses. That's why the second half of all your addresses – minus the checksum in the last six characters – is identical. Your stake at snapshot time every five days is calculated by the funds on all addresses with that stake address in them plus the rewards on the stake address itself.)

Yes, rewards are part of your stake even if you don't withdraw them (but they do not count for Catalyst voting power if that is important to you).

Wallet apps are just interfaces to the Cardano blockchain and do not set the “gas” fees. Transaction fees are around 0.18 ADA (more for larger transactions – in bytes, not necessarily in value).

And there is a minimal amount of ADA that has to accompany other tokens (to inhibit denial-of-service attacks with lots of worthless tokens). But that is not 2 ADA, but depends on the size of the output in bytes/words. It is sent together with the tokens to the other party and can be offset by requiring a respective larger payment in the other direction.

There is no network fee of 2 ADA. There is a deposit of 2 ADA once when you start staking which is returned when you deregister the stake address. This is just that. A deposit.

The transaction fee is determined by the size of the transaction in bytes. It is typically larger for transactions with tokens, but can also be quite large if you have a lot of pure ADA inputs or outputs.

You'd first have to bridge BTC to WBTC on Ethereum and then use https://app.nomad.xyz/ to bridge WBTC from Ethereum to Milkomeda C1.

As @Zyroxa said, the hard fork is just a larger system update that will not affect end users at all. …, but after Mt. Gox, Quadriga CX, … I would not tell anybody that they are safe on an exchange independently of hard forks.

As safe as it can be in an exchange.

You are kidding, aren't you?

Nope. If you scroll up, almost all of the discussions are about exactly that question. Maybe, Cardano360 published later today will have some answers: https://www.youtube.com/playlist?list=PLnPTB0CuBOBz8sfQOgpZJwM4dswLm2WKs Latest info that I have seen is that testnet operators should test version 1.35.2, while mainnet operators should stay on 1.34.x. Hard fork would require IOG to give a definitive version that mainnet pool operators should switch to, waiting for enough pools to do that switch, issuing an update proposal, and waiting another epoch until the hard fork itself is done.

Last “official” call https://iohk.io/en/blog/posts/2022/06/20/vasil-upgrade-the-state-of-play/ was: “The working assumption should therefore now be a Cardano mainnet hard fork occurring during the last week of July.” Since they would first have to call SPOs to upgrade to a specific version of cardano-node (which has not happened yet) and only after enough pools have done that publish an update proposal to fork one epoch later, it will probably be some time until the hard fork. The call for SPOs to upgrade could still happen in the last week of July, the on-chain update proposal and the hard fork itself most certainly not. Depending on your definition of “occurring” and how much you think a “working assumption” is a promise, you could call that “delayed”.

No, ADA is fixed supply, no minting or burning, just some reserves released into circulation that will slowly deplete. For native tokens created on Cardano, minting and burning can be decided by the creators of the token.

To also answer the question for Cardanoscan: https://cardanoscan.io/epochs

Yoroi shows it in your local timezone. It is every five days at 21:44 UTC.

It's also shown in Yoroi. The "End of Epoch" on those tiles. Reward payout is exactly five days later.

If you can wait one day and seven hours, I would perhaps wait until then, so that you get one additional epoch of rewards for it. But that's your call if it is so much that it's worth the wait.