There's no safest way to invest is to invest on BTC. There may be dumps but price will surely go back up but of course it will take time. We should always learn how to buy and sell or scalp to earn profits.
price of BTC may go up and down, but price of alts can go up in BTC price
buy by buying alts like Siacoin for example you can double you BTC easily in this year
so i really dont understand why majority voted for BTC