I see a great potential in business of buying and selling bitcointalk accounts , can be done to grow bitcoin, buy account when ranking is still a member and sell them when the full member, I think it's a very safe investment, all things considered.
But you also need a buyer to buy accounts, as you see the present situation there are very few buyers who are willing to buy accounts, but if you have good contacts and have good trust then you can surely make some income out of it.