This has been going for a month now: https://www.reddit.com/r/TeslaFSD/s/jgdAbgLroZ

Ever kept a car for 80 months? Also inflation.

Buying a Chinese EV that already includes everything

I wouldn’t buy a Tesla.

Are we also assuming that the monthly price will never increase?

Easy: $100 a month. Keep what's remining of the $8k you otherwise would have spent upfront in Bitcoin to appreciate way faster than $100/month. If you wanted to be ultra-conservative, keep only about half of the $8k in Bitcoin - which, as a bitcoiner, you would still expect to appreciate way fast...

Get corn with the $8k and look for a corolla instead

Either way you don't own your car and you are being chumped by scammers.

For a car the might last generations I would definitely pay the 8000. Since nothing lasts longer than a few years these days I would rather go for the 100 a month. Fiat tech, fiat action