lol. They're digital currencies/assets which were created as a way of paying people who mined with their computers.

You can mine for them. Buy them with an online wallet like blockchain.info or short sell them with a trading site like trading212. Basically 6 months ago a bitcoin was around $2000 per token, now its $15000 - 19000 per token and expected to increase.

Bitcoin is only one of many out there now, Etherium has doubled in price in a month.