What if I delete a crypto wallet that still has a bit of crypto in it? For example, will the Bitcoins left in a wallet I would delete disappear forever, never to return into cirulation? (I actually did this a few times already, except that they were accounts of crypto faucets....)
I think deleting a crypto wallet is quite different from sending a coin to an address to burn the coin. If you create a wallet and have the private keys securely kept, then even if you delete the wallet, you can still access it whenever you want, so that means, deleting a crypto wallet with Bitcoin in it, doesn't make the Bitcoin left in it to disappear. On the other hand, I don't know much about Bitcoin burn, but I know a lot of altcoins can be sent to an address to burn them and remove them from circulation which in some cases might increase the price, thus why we hear a lot about altcoins token burn. Many people who have misplaced their wallet at one point in time or the other, have tried to recover it through their private keys, thus, in as much as your private keys are still intact, your Bitcoin in that wallet will always be there. Hence, those crypto wallets you used for crypto faucets, if they have a private keys, you can try importing them to access your Bitcoin.