There are several good points in your article. My experience is that I have regretted the selling end: either selling too soon (thinking 4X my investment is good enough) or too late (watching an investment go up radically and come down just as quickly). Same goes for real estate: if you don't have to sell, then keep it.
I do wonder if BTC might go the way of AOL. AOL was really in front of the internet boom. They are still around, but not really the best application of the internet, which I think is Amazon/Ebay. It seems possible that ETH will overtake BTC in popularity and market cap.
RE: Lessons Learned from Early Bitcoin Investors