Sell or keep a shop on the seaside

Hi guys,
My mother inherited a 100m^2 shop almost on the seaside (you can see the sea from inside) of Vlorë and we are in doubt if it should be better to sell or not.

Right now we got offers for 150k€ and 170k€ which never happened in the many years she had it listed for 100k€. My thought now is that since there has been heavy developing on the city seaside for tourism, the shop’s value will only increase with time.

We do not need the money right now for our personal lives.
Should we wait or sell?
Thanks in advance