I think that if you did some research before investing, you would have realised that Bitcoin, and the alts that follow it, fluctuates. A LOT. Look at the charts and the historical data... you will see that for every relatively astronomical rise, there was a pretty substantial fall.
I believe that crypto isn't going anywhere, and it's just a matter of refining capabilities and normalising the tech before mass adoption occurs. But since there doesn't seem to be any way to get to mass adoption without loads of trial-and-error both with the coins and with the authorities who are trying to understand and regulate it, we're going to go through lots of growing pains.
So no...
not the beginning of the end. More like the end of the beginning. Onward now to the next phase