I wish the same way too and buy back again today but past is past and its time to move on. Also crypto market will still recover just hold and trust it.
But now i wish to see bitcoin above $20000, nothing i have wish except it. Because i have frustrated to see the bitcoin dump price, because i have big demand from 2018, but now 2018 never give me.
I believe most bitcoiners are wishing the same as you and it is reasonable why some people are regretting why they did not sell all btc last December. Looking at the current market move and price, it seems to be hard to get the same price as what we saw last December. Lucky me, I did sell 75% of my assets at that time and keep the other 25% till now. I have to admit that I do feel a bit regret why I did not sell it all and buy some back earlier this year but I should keep on hoping that it will rise again in the near future or even make a new all high time price.
You write here the right things. However, there is a problem - it is always impossible to find this right time when to sell your cryptocurrency. Simply do not be greedy, and do it when you get at least 30-40% profit.