I mean so far, holding cryptos for a very long time seems to be the best option, virtually almost all coins that were top 30 or so have gone up by a lot in the last few months, doubling, tripling and sometimes even 10x or 20x their price. If you bought even only 10$ worth of each, today you would have around 20k$
Yes agree, having the top 10 is the more good and advisable to keep and it depends in the person who will invest. My strategy is a continuous rolling buy cheap sell high then buy cheap again after a dummy.