Many buy bitcoins and altcoins, they wait when the price will rise and sell. What other ways do you know?
In my own opinion it is better to join any bounty campaigns or ICO although you need to find ways if that ICO you joined is scam or real. Their is a time that bitcoins and altcoins price high and low because it is flactuation but that is ICO is the other way to save and increase the capital of cryptocurrencies.