Your concern is very simple, if your having a problems about your Bitcoin holdings even it is a little bit doubt, I think better for you to sell it.
Because holding Bitcoin in the long term is the one who is willing to wait for more than 6 months or years. And Bitcoin no doubt is really good for the long term hold.
Wonder if the OP already sold his bitcoin or not?
Because you can easily ask that question here, but at the end of the day, it is you, who can finally decide what to do with your bitcoins.
What are your goals for this bitcoin investment, is this for short-term or long-term?
If you want to sell, better sell it higher than your buying price, so you are not in the negative side of profit.
Bitcoin is a solid one as compared to thousands of alts. But it is all on you, how you will strategize to optimize your profits.