That's right, if you bought your btc at 20k+ level, you are still in good place right now.
But if it was over 50k, that's when you feel hodl is not the best choice at the moment.
But keep in mind, the crypto market is not ending yet, some of these projects just began their journey.
So don't feel that you failed because it is not the end yet. Who knows, couple of months from now, we are back again in the bullish trend?

indeed long-term investment is the main need that must be a priority and I strongly agree that long-term investment is a certainty of the benefits that will be obtained. although maybe the time is quite long and of course it must have separate funds and cannot be contested.

but as you said, nowadays short trades, especially day trading, are very reliable, although of course with a high enough risk. but we know that with a high risk it also produces high profits and that is the consequence that occurs.

so indeed if you have a lot of funds of course what you say is the best solution. Minimize risks with long-term investments and seek profit in short-term trading at the same time. Both of these are carried out to complement each other, so that there is a synergy that occurs.

Because they bought coins when the price is at ita highest. We have seen continuous pump on the last month compare to month of May. Some may think that it will continue rising so at any point they bought bitcoin then hold which is not a good practice. That also happened to me last 2017. I bought at its highest. I have no other choice but to keep holding until 2021 came wherein crypto fully recovered.

Well, it depends on personal choice to Hodl even if you bought at a high price. Some people might decide they want to Hodl even if the price starts to fall just after buy-in because their target might be for a longer-term and some might decide to dump and buyback if the price dips more but as we know in crypto, every choice comes with a risk and for those that dump and are willing to buy back if the market didn't go that way, they might end up selling low and buying back high so as long as you have the patience, Hodling usually pays off. 

We have nothing to lose before selling it, and holders will always win if they do it with patience and understand how the fundamentals of Bitcoin are. Bitcoin is gold 2.0 and if we compare the marketcap of Gold and Bitcoin, currently marketcap of Bitcoin about 1/30 from Gold. In the long run marketcap of Bitcoin possible to reach marketcap of Gold, time will show us.

HODL is still [the best choice if it is hit by a high price like the current situation. The most important thing is to have a reserve fund to buy at a deep price.
if you don't hold it you have to know how much you are going to lose. Don't waste your money cutting loss is not very good. after the bearish market, of course there will be a time for a bullish market.

You should know that if there is a downhill, there will be an upslope, and so will bitcoin. If there is a bear market, there will be a bull market. It may only be that there is uncertainty in the arrival time. As long as you seize the opportunity and use the platform like the special currency industry, you will also succeed.

In the future, the Bitcoin market will once again have vitality. Now, everyone is panicking and even dumping their own bitcoins, but some people see the opportunity and are earning low prices. Therefore, in my opinion, it is best to hold your own bitcoins now, not to sell them at will, to have confidence in the bitcoin market, and to strengthen your beliefs.

It depends how much you bought your bitcoin. If you buy at peak price then suddenly a correction happened its obvious you cant earn profit and you have to wait for recovery. The price need to surpass the amount you bought your btc in order to earn profit, thats why its not advisable to buy at peak because of the risk unless you're planning to hold for long period.

Thus if you want to maximize your chance to gain from btc, simply buy in dip and wait for a bullish market.