My point of view is Bitcoin is the secure way to invest in cryptos, but not the best way to hit the moon, and i say that because the other cryptos are evaluated in bitcoin, that means 1 ETH will have his price in bitcoin, something like 0.021BTC. The thing here is; If we hold altcoins and these goes up, then our amount of bitcoin will increase. That's why i say altcoins is the right way to hit the moon. But remember, this kind of investment has a bigger risk, if the price of the altcoin goes down, then there will be a problem.