I am accumulating and holding my coins for at least 5-10 years from now (omg, icx, powr). The key is not just to hold it but to actually accumulate and buy more when it dips. If one project goes up in value a lot you might even hit the jackpot.
Do you believe that cryptocurrency will exist in 5-10 years. Especially not the most well-known altcoins . I think it is very risky to buy more tokens and coins and keep them a very long time. I'm trying to sell my altcoins not later than one year after their purchase. Usually good tokens during this time, rise in price several times.