AS more of the 808 coin community know about 421 the more this will grow I think. 421 is a lot easier to stake then 808 coin and doesn't take a lot of 421 coins to stake within 15 days. I would say around 3-5 million should stake at 10 days or between 10-15 days right now.
I think not much people know about this small but very good exchange cryptohub (very stable and much exotic coins). To get more people in 421 we really need a new exchange like nova once it opens again for new coins as MrEggman told us before. Nova opened deposits for 808 and many other coins this week, so it would be very easy for people to switch from 808 to 421 on the same exchange with more volume like cryptohub.
@MrEggman, do you also plan to list 421 in CMC? They removed the volume requirements for new coins. Maybe this would help to make the coin more popular