I am having this question in my mind for sometime that did Satoshi ever thought to make bitcoin a mainstream currency? Or did he just wanted to create merely an anonymous commodity which could be used for transactions as a side line currency to fiat. I came across this idea actually when I was scrolling around the past posts of satoshi in the Economics Section. Here are a few instances when he quoted bitcoin as a Commodity and not as a currency.
He might not anticipate that it would explode like this in a short period of time, this was an experiment and he wanted to be anonymous and he just wrote the initial stuff and we really do not know how he would have sorted the transaction bottleneck issue if he was active, the reason he went off is because Wiki leaks started collecting donation in bitcoin and that spooked Satoshi and then when Gavin met with the authorities that was the day he went offline i believe.