Binance is the fastest growing cryptocurrencies exchange. In the short duration, it has reached the 2nd position among the top volume cryptocurrency exchanges.
Over $200B of investment into Bitcoin and blockchain companies has taken place resulting in thousands of companies and hundreds of thousands of individuals involved from around the world.
Here is Bitcoin source code
There are around 376 contributors, which you can see here
Bitcoin miners, the people that make transactions permanent, are everywhere where there’s cheap electricity (mostly China and places with geothermal/hydro plants).
Bitcoin traders, the people that determine the price of Bitcoin and provide liquidity (by buying and selling it, i.e. participating in the market), are everywhere.
No one control bitcoin as it is decentralized peer to peer currency, no one owned it, the bitcoin transaction is verified by miners, every transaction verify at blockchain Network, miner get paid after solving block which contains transaction.
Coinsquare is Canada's most trusted cryptocurrency platform for buying and selling Bitcoin, Litecoin and other digital currencies.
BTCBear is an international bitcoin exchange and trading platform and payment system based in United Kingdom and Estonia.
Gate.io is a bitcoin exchange platform which supports BTC, LTC, Ethereum, Qtum and more blockchain assets trading.