I think a slight problem with this is that wallets (often ones made by third party wallet software) do not fully empty. I don&#39;t know how often this happens, but some wallets, even if you tell them to send all funds, leave a small fraction of bitcoin remaining. If this is the case, it could be detrimental to the &#39;pruning idea&#39;, as wallets with any coins left cannot be pruned. For example:<div><br><div dir="auto">A has 1 BTC</div><div dir="auto">A -&gt; B -&gt; C</div><div dir="auto">If these wallets are not removing all the BTC, and a fraction is left over, B will not be able to be pruned out of the chain. On the other hand, of the wallets are completely emptied, the new &#39;pruned block&#39; will be able to show A sending 1btc to C. </div><div dir="auto"><br></div><div dir="auto">This could be a problem, and so we need a way to persuade people to get their wallets to send everything instead of leaving a small fraction left over. I don&#39;t know how problematic this could be, or how frequently this happens, but I&#39;m just putting it out there.</div></div>