I have a buddy that's big into it. He buys miners and has multiple tens of thousands invested. For me it's too risky. Bitcoin is essentially supposed to be a replacement for cash, but for me it's got none of the benefits of cash. Transactions with it are slow and expensive, mining it uses a ton of energy, and no merchant really accepts it as tender. There are hardly any merchants that accept bitcoin and the transaction fees for it are crazy.
I think if you got in really early it was a great way to make some money. But now it's too late, the cat's out of the bag, simultaneously too many people are involved and it isn't backed by anything. It's so volatile, in the past year it's gone up and down like 50%. Plus it's starting to get regulated and taxed. Too risky for me, it's like a stock with absolutely nothing backing it.
It's not for me. I think if you put a little money in you can probably make some gains short term. In the last month it's gone from 54k per bitcoin to 67k. But back in July it crashed to 30k. So you just never know. Plus the culture around it is kind of annoying. There are so many "crypto bros" that are so sure they're going to be millionaires. Better off throwing your money into some kind of total stock market mutual fund and forgetting about. Less sexy, less returns, but less risk too.