|(Current office view) Written from Cambodia|
An affiliate merchant could close their doors, or your account could be banned or Google may not be so favourable to your blog in the future. There are so many reasons to diversify your income TODAY.
The other side to that and perhaps even a more common problem is spreading yourself too thin and seeing little to no progress on your projects. It's good to have several eggs in your basket just not so many that you cannot properly care and nurture each one. Just like growing a garden you need to give each plant the attention it needs.