Which cryptocurency to invest?

Ethereum has already had a massive climb in the past week and Dogecoin is really all over the place at the moment so I wouldn't really recommend investing in either of these unless you are good at reading the market and trends. Bitcoin has also recently gone up so at the moment I'd say that it's probably the most safest one to invest in, just because I've seen it more widely used in society (I've been to some retail stores that allow you to buy items using bitcoins) and don't really expect to see a decline any time soon. I'm also considering Steem since I think that I might be able to make money of it when the prices jump up.

But that's just my unprofessional opinion