There's a price on storage. If you want to spend $0.05 for a few hundred bytes, you'll run out of money very quickly if you want to actually use it for typical

There's a price on storage. If you want to spend $0.05 for a few hundred bytes, you'll run out of money very quickly if you want to actually use it for typical file storage (e.g. your photo album or music library). But it's fine if you want to store or record for posterity something valuable, e.g. a $10m loan transaction [0] [0] http://www.wired.com/2015/10/hedge-fund-borrows-10m-in-stock-via-the-bitcoin-blockchain/ http://www.wired.com/2015/10/hedge-fund-borrows-10m-in-stock... There's been a lot of work going into a market for transaction fees based on a supply&demand model that'd make spam not just costly, but exponentially more costly if you want to scale it. It's not perfect but it's looking pretty sensible atm.