Investing in bitcoin is a risk, as the value can crash tomorrow.
I'm holding too so far, I believe in what bitcoin represents, so I'm taking the risk. Don't invest more than what you can afford to lose however, but if you can, you should buy more.
Also have a look in other cryptocurrencies.
Every investment is risky. It is just like when you are starting to put uo your own business. It might gonna fail or earn an income. Yeah, it ia true, invest only the thing you can afford to lose so that it is not really ha4d for you to accept when it doesn't work. But I believe in bitcoin.i believe it will continue to rise.