We can never call a person a long-term investor by looking at his portfolio. There are many people who own a lot of money who can buy 5-6 bitcoins in a day if they want. If they buy so many bitcoins in one day and sell them the next day after seeing some profit, then we can never call them long-term investors. Long-term investment is an investment period of 5 to 10 years.
In the case of investment, if Bitcoin cannot be held for at least one cycle, then it can never be called long-term. As we know that one cycle is completed every four years, and for this, the investor can hold Bitcoin for any period of time above the minimum of 4 years. The longer the investor can hold Bitcoin, the greater the possibility of his return. If it can be observed before and after each cycle, it will be very clear about this fact. The Bitcoin market is always volatile, long-term investors can use this volatility to increase their Bitcoin accumulation. Those who are long-term investors and regularly invest, on the one hand, get the opportunity to increase their Bitcoin portfolio, and on the other hand, if the price of Bitcoin increases, it creates the opportunity to take even bigger returns.
3 years is actually long so it can still be consider as long term holding, but the downside of it they might didn't get the best result of their investment and I think they might just waste all off their effort made for many years of Bitcoin if they surrender and sold all of their holdings when they reach for 3 years.
1 cycle or 4 years of holding is the minimum, but if they don't need to sell it I guess its more ideal if they can able to hold their Bitcoin for many more years.
In my case I'm planning to hide some Bitcoin for retirement, since I strongly believe that Bitcoin would became more better asset in future and It will be good if I have some of it save when I'm still young and capable to earn.