The UTXO pool is a database of all of the transactions that are currently unspent. I'm seeing some analysis of this, and there is an assumption that the coins are held by HODLers if the entries are more than a year old.
is it possible to you provide data for example sum of all unspent bitcoins with more than a year status? about your question im not really sure if asking beginners is best course of action here 
if you really want to know answer to this, im not sure here but such data provided would maybe help to determine this