Long term is 10-12 years maybe a bit long. If an investor wants to withdraw profits and increase the amount of real assets within four years (one cycle), then it can be realistic for him. Instead of withdrawing his entire investment. If his profit amount in one cycle is more than he thought during the period of regular DCA method. For some reason, the possibility that the price of Bitcoin may fall should be considered in the investment thinking and you may be better off removing funds equal to the profit from the capital after a cycle.
Continuous DCA strategy and accumulation will continue and there is a strong desire to increase your assets from profits. I think selling Bitcoin before the completion of a four-year cycle is a trading mentality, so the long term should be 4-10 years.
The perspective depends on yourself in this case especially for bitcoin because in the end what we call long-term may not be for others and vice versa.
Regardless of whether the duration of time is considered long-term in the end as long as it is more than 1 or 2 halving rounds I think it is considered long-term so there is no need to question whether it is too long or not because it all depends on each perception.
I personally will still make this a long term but as for the investment time made it depends on my own perspective as long as I am still able to withstand then it doesn't matter if it is done for 5 years, 10 years or even more because after all when in bitcoin when the duration gets longer then the effectiveness and risk will be narrowed down so it is quite normal and very worth it to do when in bitcoin for the long term.
As long as we are able to withstand why not.