What Will Happen When There Is No Longer Any Bitcoin Available?

currently, the price of bitcoin seems to be overwhelming and volatile & is attracting many spectators to get involved in the game of crypto currencies, however with the price going up the way it's going, is this the right time to invest in bitcoin or is it too late?

Also, everyone seems to also forget that there isn't an abundance of bitcoin, it is very possible for bitcoin to run out, & at this point of bitcoin running out, i feel like the price is going to be ridiculous & will not allow any spectators or new 'crypto currency enthusiasts' to be able to get involved.

These are just my thoughts and ideas, please leave any comments or feedback or even opinions for me to learn more, thanks!!