To buy or to create oneself? This is a question that cannot be put in context with many currencies. The bitcoin by all means is one of them. And the answer does not depend on any legislature but on the economicalness with which bitcoin mining can be put to practice. It is a characteristic of the process that it gets more complicated the more miners take part in it, and a higher amount of processing power is required.
The development went rapidly: While by the beginning of 2011 normal CPUs could be used in order to calculate hashes these were replaced more and more by the more efficient GPUs as these are able to process more arithmetic operations per second, which means generating more mhashes per second. But the graphic boards, too, reach their limit, as it is only certain ATI models that allow for an efficient mining process. The turnover is always counteracted by certain costs. With regard to the bitcoin these are, if purchased for mining on purpose, costs for buying a computer and a graphic board and, of course, electricity costs.
So, one thing should be clear right from the start: The big financial breakthrough with bitcoin mining will be possible only if achieving highly favourable conditions regarding the costs. Even if one is able to calculate tightly there will always be somebody to mine at even lower costs and who will lower the price and with it the Euro and Dollar rate. Since the development of the bitcoin is very positive right now mining does not have to result in any financial loss. If a person does not buy a new computer, doing the mining more or less on the side, a small profit can be expected. But as soon as investments have to pay things get more difficult. Doing a comparison is inevitable anyway. Graphic boards, enlectricity costs, and the Dollar rate for bitcoins are the dominating factors when talking about the rentability of bitcoin mining. Should profits be lower than expected, a good portion of idealism might compensate for that, and optimism should be part of the package, anyway. If the rate goes up for the Euro or U.S. Dollar for bitcoins, mining and selling bitcoins on the marketplace might turn out to be much more profitable.