there is many website you should work with them like html and designing they are paying in bitcoin and the other way is you can buy bitcoins in huge amount and then hold it for long term then i hope you can grow up your bitcoin with easily and faster.
Like freelancing job there are many website that accepting bitcoin payments like
https://www.xbtfreelancer.com/ almost all jobs are in there programmer, designer, web developer, etc.
You don't even need to go onto a website that pays in Bitcoin. Most freelancer websites are really good and you can then buy Bitcoin with the fiat that you have. You will probably get less money on a Bitcoin freelancer website.