In theory, "lightning networks", which are basically a network of open transactions across wealthy, participating nodes (e.g. banks and exchanges.) A lot of sma

In theory, "lightning networks", which are basically a network of open transactions across wealthy, participating nodes (e.g. banks and exchanges.) A lot of smaller transactions can piggyback on the larger transactions basically for free. I don't think these are widely used in practice yet, but I might be wrong.