A rolling epoch,  as suggested in the paper, not only helps keep the
   blockchain length tractable it also prevents "submarining" from assets
   which haven't moved since the early days of a blockchain (e.g.,
   Satochi/Finney and new blockchain pre-mining).

   On Mon, Jul 2, 2018, 1:30 PM juan <[1]juan.g71@gmail.com> wrote:

     On Mon, 2 Jul 2018 06:49:04 -0700
     Steven Schear <[2]schear.steve@gmail.com> wrote:
     > In 2013, a paper I contributed to offered a solution to the ever
     growing
     > blockchain delema: a finite epoch. The solution is similar the one
     Chaum
     > used on Digicash. It would fix, temporally,  the blockchain to
     include only
     > transactions for the past 2 years,
             and what happens to funds older than 2 years?
             "Any money still held from transactions in these blocks
     would be freed up, and released back to the network in the form of a
     lottery."
             lolwut - that's trolling, right? =)
     > for example, thus creating a blockchain
     > of tractable and predictable size for affordable full nodes.
     >
     >
     [3]https://www.coindesk.com/bitcoin-activists-suggest-hard-fork-to-b
     itcoin-to-keep-it-anonymous-and-regulation-free/
     >
     > More recently, I've co-written a paper proposing a distributed
     service
     > solution that could solve thin wallet privacy and security issues
     without
     > needing to trust individual full nodes under the control of
     others.
     >

References

   1. mailto:juan.g71@gmail.com
   2. mailto:schear.steve@gmail.com
   3. https://www.coindesk.com/bitcoin-activists-suggest-hard-fork-to-bitcoin-to-keep-it-anonymous-and-regulation-free/