The best time is when we high lower lows in 2018 and 2019, which is around $3000'ish.
But if we go on your argument that we are going to hold in the next 10 years then yeah, possible, as you as you have a tough mentality to hold in that span of time. Anyhow, I'm basing on my experience, I have stocks that I hold for more than 10 years so it's doable. The only thing that might sway people though is that crypto is very unstable and risky because of it's volatility.
I totally agree with you and I remember this time as clear and was also trying everything possible then to get as much Bitcoin as I could after seeing what happened with Bitcoin price in 2017/18 however, I believe that Investing in Bitcoin should always be targeted at the bear period for maximum profits but like you said, considering the duration of your HODL plan and your risk ability, Investing can be done any time.