Best investment is in the stock market. ETF accounts are the best. That is a fact 
investment in stocks as an investment in a altcoins where the value can rises and down, I'm not sure to invest in stocks?You can't compare stocks with altcoins. Stocks is something you hold for a longer period of time after doing proper research about it. Altcoins are a matter of luck. It MAY go up, but it also MAY go down. Altcoins are basically the same as gambling.