Too Long; Didn't Read
Bitcoin is resistant to the so-called double-spending problem. Miners are incentivised to do this through an automatic system that gives some coins every period (in Bitcoin it is now 12.5 bitcoin per 10 minutes on average) In practice Bitcoin mining is not as democratic as it was originally planned by Satoshi Nakamoto. In practice, mining is dominated by wealthy companies and individuals. The result is that one or two companies own all the distribution of the mining power for a quasi-centralised mining system.