I think the point he was trying to make was that there was no strategy that does not have its disadvantages and advantages and not necessarily how he put it because the strategy with which the Bitcoin is purchased is not what lead to loss but how the investment is managed after they have been acquired is what shows the level of loss the investor will be exposing it to. We should not forget that losses in Bitcoin is only possible when we sell and it is completely something of choice to lose in Bitcoin because if you refuse to sell, your 1BTC will always remain the same quantity in your wallet. If you can just hold a little longer, the value will go higher and you will not be selling at a loss. This is the reason the investor must endeavor to buy with amount that can allow him hold longer and not be forced to sell at a loss.
Of course, if the investor invests in Bitcoin, he can hold it for a long time, but in this case he has to follow the DCA method. Because investors will continue to buy dips using the DCA method as they see current Bitcoin market volatility. In this an investor will invest for a long time and it will help you to keep it for a long time, usually if the investor is lazy in adopting the strategy he decides to sell the bitcoins.
So every investor should follow the DCA method if he will be able to hold Bitcoin for a long time. And he can hold the bitcoins again for as long as he wants without any problem if the DCA strategy is followed.
Using DCA method go knvest in bitcoin is not a guarantee thay you will be able to hodli for long because if you DCA wrongly but not using ghe right amount from your discretionary income to DCA and have your emergency funds and reserve funds available, you will end up selling your bitcoin.
A rich investor can start his bitcoin investment with only lump sum from time to time and hodli for long. He would not sell any of his bitcoin till at his own will. Example is MicroStrategy who has being on bitcoin purchase through lump sum and he is still hodling those bitcoin. Only lump sum is mainly practiced by the rich because they have huge income and they can lump sum without any problem due to fat discretionary income.
An average man or poor man needs DCA, because he has little discretionary income and from there, he can use part of his discretionary income to buy little by little whenever he gets paid regularly for a very long time. DCA will also help him take advantage of the opportunities in the market due to bitcoin price fluctuation. However, a rich man can still use DCA method because iy is for everyone.