I think it's worth. Poland would be a member of strong economical community. Euro is a curacy of 337 million Europeans.
As things are now, it might be better for Poland to wait. If it was just a matter of closer economic integration with rich countries like germany and france, it would be an easy choice. But unfortunately, joining the euro would also mean getting chained to irresposible countries like greece, which should never have been allowed to join in the first place. Until the eurozone fixes its problems with greece and other countries -either by forcing them to shape up, or kick them- Poland should not join, because there's going to be problems eventually.
If they impose euros in Poland half of Poles would flee to England and Germany as it happened in the Baltic states - Latvia, Lithuania and Estonia. Then they would start whining Russians want to sieze them.
Anyone who wants to leave Russia can do that. USA, Canada, Israel, Finland, Germany - just pick a place on a map. And, of course, learn language, have some profession, spend some money and time. But most of people prefer to stay in Russia, because there is a difference if you want to leave and if you need to leave due to economic reasons - the latter is the case of Baltic states where people have to go abroad to find a job.
Theoretically Russians can leave Russia and work, for example in EU, but practically it is a difficult way because Russia don't belong to Single Market of Europe. https://en.wikipedia.org/wiki/European_Single_Market So, it means that Russians must receive a permission to live and work in EU. Knowing that in EU already are lots of migrants such possibility for Russians work and live in Europe is only theoretical [: I understand that Russians are very patient people. You can live very poor, but you still love and like your regime. Maybe it's good. No one wants Russians in Europe.
We like our regime, you like your lovely migrants from Middle East and Africa. Let it be so, I don't mind.
"Is is worth for Poland to become a member of Eurozone?" The question is wrongly stated - correct one: "Is Eurozone worth joining for Poland?" .. and quite obvious answer is: NO
Eurozone is a mechanism that drains money from other European countries to Germany. Poland officialy wants to join but didnt point when it will happen. But to be honest neither goverment nor citizens want Euro after what has happened to Greece or what will happen to south Europe.
Polish will congrations they are stronger current situation than WW2 and will force up with Euron. And new leader in Germany and soon in France too.