One of my option is, you invest some to the BTC, ETH and ADA, it may be good if you put it on 50:20:15 into those coin, and the others you can choose one of the big losers in the coinmarketcap, buy low and sell high
One of the most important factor which can then help you in making the right choice of the coin in which you should make the investment is your financial status as you cannot invest in coins like that of the bitcoin if you dont have this much of the money. You need to look for all the coins which you can afford to buy and then you must choose the best possible coin out of these coins.