There are many ways to earn in crypto. Bitcoin alone has many opportunities to choose from. You can earn through this forum, you can also earn through trading cryptocurrencies. You can also offer services in exchange with Bitcoin. For other altcoins, you can join bounty campaigns, invest in their ICO, mining tokens then hold it and then exchange it if its value appreciates. There are several ways to earn, it is you who will decide where are you comfortable at and where you enjoy doing it.