Holding is always the best option. I have been holding for years, and the peak to nearly $20,000 made my holdings worth more than ever before, but it's nothing more than a profit on paper. In the same way, you have just a loss on paper. If you have been following the market for a while, and see how profitable these movements are, try to trade the market. One stash is purely for holding purposes (you don't touch these coins for a very long time), and one stash purely for trading purposes. These insanely volatile days allow you to take advantage of these money making opportunities, but you have to understand what you are doing, and have to be willing to trade against the volatility. If you're not a trader, then just keep holding and use these lower levels to accumulate (if you have free capital).
The issue with this is that holding isn't always the best option. Holding is the best option only if you believe that after each peak, bitcoin will
surpass that peak once more in the future. There will be a time where bitcoin ultimately stops going up, and that's pretty much inevitable. We just don't know when that will be.
Instead, OP use your research (which I see you do a little of just by the post and future events of BTC) to buy low and sell high. Remember, you don't have any profit (technically) until you get your money back to whatever original currency you were using. In the crypto markets, nothing is guaranteed.