greed is a bad trait. so, my advise - devide your bank into several parts - 40-50% always keep in BTC (in case the altcoins go down you can buy them very cheap, if you have free BTC), 25 % - altcoins from top 10, they are stable and grow up slowly with every year ( look at coinsmarketcup) and other part - in new coins (tokens), some of these coins are undervalued and soon they are able to fly up ( Ada, Verge made this as example). I hold 5-10% in Ethereum, but it is optional.  Dont forget to fix the profit.