The only reason Im not mining today is because of the block difficulty. Now, if it gets to a reasonable amount, Ill be hashing like a mofo. I speculated on the btc because only 1 or 2 people caused it to tumble. Now, if it were thousands or even hundreds, then I would have thought it would be in the cents by now. Right now, with the cost of electricity, the difficulty level to obtain the chain and the cost of a good GPU processor(s)/machine, is hardly worth the effort. But when the difficulty drops by even by 25 percent, im probably at least going to dabble in mining. Just for a hobby and maybe expand from there... But overall, speculating on the bitcoin market as a day trader or even as a hobby is extremely dangerous. (unless your the owner of mybitcoin.com )