I am an international student in California. Is that possible for me to buy BTC online. And what kind of platform is recommended?
As far as the concern of bitcoin economy, it is a digital currency that can be bought and traded in any part of the world.
You can buy bitcoin easily from many websites such as blockchain.info , coinbase.com using your credit or debit card.
Then money will be instantly converted into Btc if you buy from blockchain.
Coinbase is not instant in conversion matter, it may take 2-4 days to reflect Btc in your account.