You have stated this repeatedly, without telling us why.

If Estonia maintains its own currency it has some control over its own economy. Yes, currently the kroon is fixed to the euro, but should a brave politician proceed to devalue it, the cost of labour in Eesti would decrease and that could help the 100,000 unemployed to find work.
Of course this does not sit well with the Estonian (Reform)globalists whose wealth vis a vis the rest of Europe would be decreased.
In addition to keeping its own currency, Estonian politicians should ignore EU laws that constrain entrepreneurs in Eesti from being able to initiate new small business ventures which could also provide some relief for their economy..

No one is able to present a coherent argument in complete favor of the Euro as against staying with the Kroon. The only thing that has changed since the first time that Estonia could have joined the Euro zone in 2007 is that the Euro is and is continuing to become a much weaker currency due to the fallout from Greece. Meanwhile, Estonia has done everything in its power (in the meantime at the cost of ensuring a stable Estonian economy between the years 2007-11) in its breathless race towards the Euro zone. I am inclined to believe that the loss of economic stimulus on the part of our leading politicians due to the national campaign of poo-pooing the kroon in order to hypothetically lift the image of the Euro is going to come as a major blow when a reality check of the Euro is done against the substantial economic activity which has been lost due to the inconsequential needs to lick the shoes of a few Brüssel sprouts because it is in our politicians best interests to serve them rather than the people who voted for them in the first place.