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.
I would imagine that some investors who have been in the market for less than 4 years can be considered new investors. It takes a long time to accumulate Bitcoin in particular. If you reach the excess savings level in the middle of 1 cycle, you can sell if you want. But you have not reached your savings target and you have made some money and you want to sell and take a profit, this is never a sign of an investor but a sign of a trader. It is not right to sell your holdings until the time limit or until you reach the excess savings.
There seems to be a bit of a time factor in investing too... even though sure we can imagine cases in which someone might have had accumulated a sufficient amount (and even more than enough) bitcoin in less than 4 years... yet many folks are not able to frontload and/or able to lump sum invest into bitcoin so much, so it does not seem very practical to be talking about the exceptional situations rather than the more common situation that is may well take 1-2 cycles or more for most normal people to even be able to invest a whole years of expenses (or their income which is a higher amount) into bitcoin.. .and then if during that one or two cycles, then there has also been time that passes, opportunities for BTC prices to appreciate and even the value of the investment to compound, which then tends to give more options to the person investing in regards to how to manage his bitcoin investment, and whether it is mostly holding onto the bitcoin, then that would seem to be investing, but if the person is mostly cashing out, then that seems like trading rather than investing.