Well, I think keeping the coins for 5 years is kind of a signature to the loss. Except BTC, all other cryptocurrencies need to be updating and adapting people so that the prices up front justify something. For example, 5 years from now the BTC is the only certainty I have at the moment that it will be firm and strong. I can't explain it, but there is something related to BTC that few people know about that allows it to be the 1st in cryptocurrencie with few objective things. There are certainly faster, scalable, anonymous and even safer coins than BTC, however it hasn't threatened its 1st place yet. In resume, holding anything other than BTC for 5 years is totally risky.