Warning: microcash is solidcoin also known as scamcoin
please avoid it.
ScamCoin is not SolidCoin. ScamCoin is not MicroCash.
MicroCash = SolidCoin with twice the self-promotional preaching and ego-maniacal blindness.
You also have to take into account the user friendliness that MicroCash has, which Bitcoin does not have yet.
Once the 21 million bitcoin blocks are mined, there will probably only be like 20 or 19 million (or maybe less) that are actually able to be spent without cracking the wallets (which will take a long time to do).
With MicroCash, most of the money can be spent and it is basically like being your own bank to a new user where you can get paid interest.