On public speaking anxiety

I've been toying with the idea of making money as a speaker. For some reason, I have very little public speaking anxiety in the normal sense. I've spoken at panels at science fiction conventions. But I guess I'm reluctant to start something that I wouldn't and couldn't take very far. I can't do it in The Philippines. Or could I? Maybe I could give speeches there. Would they pay me much? Probably not. Maybe I'd get business from it. That's a thought. But on the whole I realize I'm most comfortable just sitting in front of a computer writing. I just need to increase the income I make from that. I wish I could find a way to do that without hunting for clients.