That was quick, easy, and simple, thanks.

Now, with that in mind, is this conducted through an exchange, or is that a totally separate bag of worms?

I've done some searching w/ no luck, so feel free to just link to the appropriate, pre-existing response, if it exists.

Once all Bitcoin or Ethereum are mined, what is the incentive for anyone to continue verifying ledgers/transactions? If I understand the process correctly, miners are the driving force that make transactions process and maintain the currency and validity of the ledger. They get paid in new coinage, so how does the process continue long-term once all coins have been mined?