my choice is still in ethereum, neo, ripple, cardano and eos to be one of the best investment coins. so I think this is the best choice for you to speculate with coins that don't have the best potential.
I suggest to you that Bitcoin is the right choice because the value of Bitcoin is very high among altcoins, 9-year bitcoin is able to survive and compete, the price movement of Bitcoin is also a reference for altcoin price growth. my advice is to put your capital in bitcoin and be patient waiting for prices to rise.