http://invest2idhnehbsap4drbilvo7unpjcmuddetz7pgtndlmo3hm5lu4yd.onion/excel-bitcoin/index18.html
I updated the article every few months with new numbers to keep it fresh. For the next 2.5 years after publication, Bitcoin went up to $20,000 and collapsed to under $4,000, went up to $12,000 and briefly collapsed again to under $4,000, and by April 2020 was back up to $6,000-$7,000.