I am also afraid that the end of 2017 might be the same as the end of 2021 but my mistake in 2017 leads me into a better thing in 2021 because if I converted all of my bitcoin last 2017, I will not watch it rising right now. Now 2021, I am still planning to hold and save more not only bitcoin but also other good coins that I might earn thru joining campaigns. This rise in price of btc might happen again in the next year or in the next 3 or 5 years so I must be prepared for that.
This is precisely why it is not going to happen in exactly the same way, the markets are not just a bunch of charts that we try to decipher, the markets are made of people and if you are thinking this then you can be sure the rest of the traders and investors have the same misgivings that you have.
With that in mind then the end for this bull run is going to be different than what we saw back then, it will either end prematurely as people sell their coins thinking a crash is coming while they try to secure their profits or this is something bigger than a bull run and instead of ending at the end of this year we could see years of positive growth as people get nervous about the future of the current economic system based on fiat currencies.