I always mine for the future. No matter what the current price of alt coins is. Because if I start thinking of the alt coins current situation and if the market value is not that good then I lack my confidence of mining. So it is better I don't look at it and keep mining for myself. I trust bitcoin world and its relatives a lot. So I find it more secure to mine alt coin at some instances. Anyway I take it as side business and don't mix it up with personal earnings from real job.