Well, I agree with you and I guess one of the reasons for bitcoin to get all this value is:
It still controls the market as it's the main currency to buy any other asset.

It's usable everywhere on every exchange, so it's the head of the market.
Also, Lighting network I going to fix all issues about it such as transactions time and high fees, and that's going to keep bitcoin on the top for a long time.

One more thing:
Bitcoin is going to be the most popular payment method for anyone in the next few years especially, people who don't have bank accounts (PayPal's CFO said)
Here to check: https://cointelegraph.com/news/paypal-exec-says-very-high-likelihood-bitcoin-will-become-popular-payment-method

Thank you for sharing this info with us @ddangerwu :)