No, there are currently a far greater number of coins that don't support atomic swaps than there are coins that do. Most coins
can support it, but most of them aren't there yet. Hopefully that's something that will change over time, but it's still a relatively new concept.
Also can bitcoin be traded for any other coin that exists and vice versa?
Yeah bitcoin can be fairly traded for any coin
Traded in an exchange perhaps, but not via atomic swaps. While it's
technically possible to perform an atomic swap between Bitcoin and Litecoin, something that was achieved in 2017, it's not something which is practical for users to do yet. Atomic swaps are not yet possible with "
any" coin. It's safe to say that's at least a few years away, if not more.