your fine if that is what you want , buying and selling btc but if you want to go beyond buy and sell btc you can learn the blockchain technology  . usually the one that learn blockchain technology the most are the coin developers and those that who work to improve btc .

the op already have a good list on his blog and i cant think of any good to add on his list but maybe he can work on the design , trying to make it catchy especially for those that who use mobile phones because i notice that the site is plain after visiting it .