Since pride comes before a fall, I try not to let my income define my identity. It's nice when I'm up but I wouldn't let it build up my self-esteem so much that when traffic changes/sponsor changes/legal regulations changes force a crash in income I am left feeling devastated. I look at income merely as a scorecard to see if what I am doing is on the right track. I'd rather gauge 'income' by how many traffic streams/ideas I am successfully executing
The last time I bragged about my income to someone, my income crashed to half within 30 days. Call it coincidence or call it the Evil Eye syndrome... but there's definitely something to be said to keeping things on the DL.