1. Must I pay income tax before investing my bitcoin earnings to stocks?
2. How profitable can stocks be?
3. This is probably lame but: what stocks would you suggest to buy?
1. In most of the countries, capital gains tax must be paid on profits from Bitcoin sales
2. Unpredictable. Depends on the economic situation of your country.
3. High-Dividend stocks usually have very slow growth. So I prefer non-Dividend yielding stocks.