You can earn money in various way -like PTC site (simply clicking the add), Bitcoin site, Survey site, Blogging ,affiliate, posting unique video, forum posting, sailing and advertising etc. Remember all sites are not paying , so select your site to check the scam review. Here are some trusted web address, you can earning some money using below link.
If you want to earn by bitcoin then need to create first a bitcoin wallet , you can create bitcoin wallet using below link https://www.coinbase.com . Below listed bitcoin site are legit and trusted , you can earning very easily from below site –
You can earn from Panelplace http://www.panelplace.com
You can earn a good amount of money if you have good knowledge to write some article , you can earn from this site – https://www.iwriter.com