I bought bitcoin when it was around $14,500 in January and I am still holding because I am not discouraged. I have great hope that bitcoin is going to increase in price and volume in some years to come.
Glad to hear that you aren't discouraged. I think, instead of just holding BTC which you bought, you can trade it with other coins and increase your sats. This way, you can reduce the average buy price of your BTC. For example, if you double your BTC by trading, your average buy will reduced to half of your original buy price.
You have given a very good explanation but when it comes to reality most of the people will afraid to trade because we don't know when the price of Bitcoin will declining. That's why we have to keep spare money with us with the market starts falling we can able to average the previous prices.