Altcoins & token swaps?

Hi all!

During last few years I've been inversting on dozens of different alt coins, with a purpose to hold them for a long term, maybe 3-5 years. Now I noticed that there are coins such as Qtum which are not anymore using Ethereum blockchain, but have been swapped into it's own Qtum- blockchain. So, to be able to use or sell my Qtum- coins, I should do this procedure called "token swap".

And when I Googled for "token swap", I noticed that many other coins that I own have also already transfered onto their own blockchain & wallets, or are going to do so in the near future.

So my questions are:

1) Do I really need to do this token swap right away for every coin I own, as soon as it's possbile? Or could I just wait for that 3-5 years, and do the swapping when I'm ready to sell some?

2) I could not find a list of all swappable coins, is there such a list anywhere?? I mean; is there any site where I could check if a token swap is needed for my own coins or not?