I'm in malta and was around with a friend, we were talking about Bitcoin and all of the sudden I saw this from far

I couldn't believe my eyes.
I think it is an advertising poster because it is very visible and is clearly located on the edge of public travel.
there may be a group of people who deliberately want to introduce bitcoin to all people.
Yes i agree with you, i think it is an advertising poster whom maybe post by a bitcoin user and they post it because bitcoin is very popular now in worldwide for giving more and more opportunity for us. Maybe they want to spread or advertise it to inform everyone that is not to late to improve our life situation and lifestyle for the better life . There is no harm posting this kind poster in public as long as it really helps every individual.