I disagree with anyone saying it's a gamble.
It's a not, I believe it's more like saving ur money in form of gold. It might see some drops but it's curve will always be up. Or the right saying would be, the paper money is always losing value, cuz you can always print more. They have unlimited amount.
In the other hand crypto currency is limited. There is a limited amount or number, and there will always be a need for them. Actually, very few know it, so, I believe it's just starting to take off.
As long as no one comes with another better solution, it will stay. All crypto currency did is showing the real value of paper money which is just useless printed papers.