the size of the block chain is ever expanding, by the year 2100 i predict it will be over 1 terabyte, making bitcoin unmanageable for ordinary people who want to run a node. which means we will have to trust our bitcoins to some third party intermediary at some point in the future. do you see this as a problem or no?
i think, in 2100.. we could have usb pen drive with a minimu storage of many petabyte..and a read spedd of dozen GB/sec.
or maybe in 2100 we could have a new generation storage device, unknown until now...
i think....
:-)