Could it also be φθάνουν or is that another meaning?
Φτάνω has two meanings:
Εμείς φτάνουμε ! We arrive !
Τα χρήματα φτάνουν! The money is enough!
So, if you do not use a subject, then it is not quite clear about what you are talking (unless it is clear from what has been said before, or the context).
Hi Glavkos, money is singular in English. :-)
Corrected!!! Thank you...
φθάνω (φθάνουν) is the archaic form of φτάνω (φτάνουν). So, it's the same meaning, but "φτάνω" is the one that is normally used.