Who Funds Bitcoin?

Does it need to be funded?

Some companies (such as Bitware Co. and BitPay) fund development of alternative Bitcoin implementations, of which the code can potentially be forked and included in Bitcoin Core. Other companies (including Lightning, Blockchain and, again, Blockstream) fund development of lightning networks, which is technically not Bitcoin Core, but is closely intertwined as it works toward the same vision and mission for Bitcoin.

https://bitcoinmagazine.com/articles/who-funds-bitcoin-core-development-how-the-industry-supports-bitcoin-s-reference-client-1459967859