To learn more, check out our in-depth guide to buying Bitcoin with Paypal. Although its fees are higher than Coinbase, they have instant delivery and higher purchasing limits. I used to purchase btc from coinmama using my HDFC debit card. They are based in Israel and support several countries and nearly all US States. Bitcoin Blockchain is decentralized and the interactions are managed on the peer-to-peer level or individual basis in regards to mining.