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.
Yes, take the advanture that you can offer and no more.
If you can see the bright future of bit, be patient no matter what the price they are right now.
no matter lose or not, you still do not miss the chance.