InstaGC is another good GPT site. It has a decent amount of paid surveys as well as other options like Figure Eight tasks, signing up for websites, watching videos, betting on sport, and more.
It is a site that is available all over the world, but the number of opportunities can vary from country to country.
In addition to getting paid in Bitcoin, you can also get paid through litecoin, ethereum, PayPal, and choose from many gift cards.
Before you can get paid in Bitcoin, you do however first need to earn and withdraw a minimum $50 in other rewards. After that, you can withdraw in Bitcoin, when you have earned $10.