I think orbital solar collection is interesting, but I'm not sure why it needs to be used to mine BitCoin: can't we just use the energy to power a microwave bea

I think orbital solar collection is interesting, but I'm not sure why it needs to be used to mine BitCoin: can't we just use the energy to power a microwave beam to collectors on the surface? Not sure what the economics of that is vs. the cost of launching a geostationary satellite though.