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.
Having a tough mentality is really needed but most HODL'ers just forget about it then suffer the consequences of forgetting their own passwords to access their own Cryptocurrencies. Its also good to see someone stay on the field of Cryptocurrencies for 10 years because for my case, even though I know that I can earn money within this Industry, there are just moments that I think about getting myself a capital then investing it since earning within this industry can be really slow without any leads.
That is why I really believe that as long as you see the opportunity to buy, I will grab it.