It is hard to invest specially in crypto, that is why we need to be wise in choosing on any type of tolen or coin to invest. In my part i always prefer to those coin or token that is really active and trusted example of a good coin to invest is bitcoin and ethereum. Because bitcoin and ethereum is already trusted coin and many investors believe on it.
I do not think it is hard to invest in cryto currency; infact crypto currency trading and investment is the easiest and most simple means of trading or investing on the blockchain. The hard thing meanwhile is that it is hard to learn; most people just want profits, sooner, quicker by any means instead of learning. IF YOU learn your ways into crypto currency trading and investment, believe me; you will enjoy trading.
Investing in active and dominant tokens is also a good move, but you must learn when to take profits.