A reminder:

There will only ever be 21,000,000 BTC

If you own 1/21,000,000

You own 0.00000004762% of the total monetary supply

1 BTC will cost $1M, then $10M, then $100M

Eventually, the only way to get more BTC will be to exchange your time for it

You DON'T need to buy whole coins - each BTC can be split into 100,000,000 unit, so you can buy fractions!