I agree with your strategic concept that investing is very good if it can last up to 3-4 years, as we have seen from year to year with significantly increasing prices. there is nothing wrong if you can invest now and can save up to 4 years in the future., because it is very likely that bitcoin will reach $300k in 2025 in the future.
If that's the goal for investing in bitcoin. Make sure that you won't be selling at $100k-$200k.
Because if those prices have come, you'll be tempted to sell at those prices. Even I, I wouldn't have any thought of selling some by that time.