Is it possible stable coins could have their own bank since they are backed by a country's currency like the U.S Dollar which they use to maintain a stable value?
Or also, knowing that stablecoins are different from cryptoassets which do not have assets as backings and are more volatile, will in the future, the success of stablecoins not call for something like a bank or a recognized office building built to show legalization and acceptance as a means of payments for transactions and services?
We don't need to have bank on our assets for stablecoins, our encrypted wallets is one of the best security. Banks isn't a reliable storage for this because the control is not in our end anymore. Digital wallets like metamask, trustwallet and different trusted platforms. These coins is now running through crypo network like bsc chain, ethereum and trx which made it more sustainable when it comes to trading.
Exactly, for long-term investments like what you are doing, it is very smart, it is better to store assets in the form of cryptocurrency such as Bitcoin in wallets such as Electrum and others. Because a wallet like this can be stored for a very long time and will not be affected when a problem occurs at the exchange which causes the exchange to close.