I want to invest some bitcoins to buy VIA coins. is this the best time to invest this coin?
I can see the price is being down and I hope it will be good chance to buy VIA coins.
Thank you.
well, the best time was a year ago

just like the best time to invest in bitcoin was like 6 years ago :p
you will have to decide for yourself, do some research,
take a look at roadmap, whats already done, whats being worked on
and what will be worked on in the near future, planned features are very real.
developer team is pretty active and open about the plans for viacoin