Thank you all for the comments and suggestions. In the meantime I have purchased a bit more from this particular coin as I still believe it is cheap for the long term. Lesson is learned. I am in the process of building up my plan to execute and stick to it.

I didn't want it to name it myself but yes you are right, it is Stratis :-) The coin I trust most.

I was also following the bip91 process, I just wanted to do different than everyone else was doing or thinking to have gains as this is what I have experienced in this market however selling all coins of my favorite was a big mistake. Now it is easy for me to say like that, if there would be a crash/dip this weekend, everything would have been different.

The questions I keep on asking myself are;

1- Why did I sell all coins of my favourite? (I should I have sold a portion but I was thinking I was doing the right thing at that time, I really thought I would increase my 1661 coins to 2500 coins)
2- Why didn't I re-buy when I realised that I sold too early? (I was hoping that the dip/crash would come so I waited and risked)
3- Why did I emotionally act in this way? (When I entered the market, I told myself not to sell and was actually doing good)
4- Why didn't I profit from this crash/dip and actually ended in missing the opportunity? (Now the situation is over and I am having less than coins then before which I expected to have the opposite)
5- Will there be a new crash/dip where I can buy cheaper or will this coin keep on increasing? (I don't know the market enough to answer this and just hoping I will get the opportunity to buy more)

Now only 2 things keep myself less-guilty;
1- I didn't loose any money, just lost an opportunity
2- I have at least re-bought 603 coins and having some gains.

I cannot think of anything else other than this situation. I need suggestions to get this over as I keep on blaming myself.

I have started to invest in crypto currency 2 months ago, invested in 8-9 coins about 10.000$ in total. This was the amount I thought I wouldn't mind if I loose. In a week, my investment went up to 20.000$ and didn't sell anything and was very happy with the situation. Then I experienced that the market is so volatile and my blockfolio was showing everyday +-1.000$ . When the date got closer to August 1st, I wanted to prepare myself to buy low as I anticipated the crash. I have sold 3-4 of my coins all with gains (not as much as I wanted but still gains) with the thought that I will re-buy them with a larger amount. I was increasing my USDT and was happy with my preparation. I had 1661 coins of my favourite (I will not name it) at 3.28$ in the very beginning. This coin went up to 10$ during the last 2 months but didn't sell it as I trusted in this coin very much. Last Monday I sold all my 1661 coins at 4.11$ with the hope and thought that I will re-buy them at around 2.5$ during the expected crash this weekend and I thought I would increase the number of my coins. However the things didn't go as I expected. I have very soon realised that I sold them too early but was hoping to have a dip/crash and this never happened. I just watched the coin to increase and increase, it caused a lot of pain. During this period, I bought back with small amounts at 5.08$, 5.10$, 5.13$ 5.56$ and 6.64$, now I have 603 coins which is less than half of what I had. I am still keeping some fiat to buy it cheaper but now it is over 7$. I feel so bad about the mistake I made. I didn't loose any money but I feel like I missed the train. I am still hoping that the price will come back down so I can buy but it doesn't seem like it is the case. I have learned my lesson, I should have invested more instead of selling. Now I feel like the only way to feel better is to have the same amount of coins which I had before even if I have to pay more. I am still holding other 5-6 coins and they are all bringing values but the mistake I made with this coin impacted me a lot. During the day I cannot think of something else and i blame myself a lot for selling all. I didn't sell with the fear that I will loose money, I sold them to re-buy cheaper and at the end hoping to have more coins. Did anyone experience a similar situation and do you have suggestions so I can feel better?
Thank you.