They're not the hottest but it's the cryptocurrencies. They're different if you're going to describe cryptocurrencies as digital currencies then you're only taking the part of those stable coins that can be used as the same because they're not volatile. Whilst for most of the cryptocurrencies, let's start out with bitcoin. It's very volatile, risk is there but it's the worthiest risk to take if you're going to ask me. Aside from easy to hold it, you don't need to learn rocket-science holding and buying it. Investing on bitcoin is safe in a sense that you're the one holding your asset rather than any other third party. But make sure that you're going to be vigilant with those scams that are using bitcoin to attract victims.