Don't hold some good but random altcoins for a long time. If you still want to hold then don't leave their telegram group or other social accounts, check updates on a regular basis. Because if you just hold and keep it in a wallet for 2 years then who knows after 2 years your coin's value may turn into zero value, because of the swap!
I lost many coins because of swap things! Recently Insolar is swapping their token, I did not know about it, because I have been holding for two years but did not care enough as the price was very low! Today I was checking the Coinmarketap android app and saw Insolar coin increased by 530% but their ticker is XNS when I knew it was INS! So, I joined their telegram and get the updates about the swap! Unfortunately, If I fail to swap on time then all of the value of my holding coins will be zero! So, except Bitcoin, Ethereum, don't trust any coin for just buy and hold for a long time, rather keep updating yourself!
Most times you hear people saying holding is bad and it is this issue of swapping that causes it, hence the total concentration on major altcoins which are already built and have a clear line of development. But from another angle, most of the projects doing swapping is all for the betterment of the platform as they wish to migrate to their own blockchain so as to fulfill their obligations. Which is also a good reason to have a good roadmap as to when swapping is anticipated to take place, so that every potential investor can have that in mind prior to investing. In the same way, visiting the telegram group once in a while saves unfortunate circumstances.