Looks like you guys are really trying to keep in touch with your future investors. You can immediately spot the difference between this project and most other ones which try to get as much profit as thy can with as little effort.

Families have always given children with a small sums to children... Till the time the world uses fiat currency, handing over $1 or $5 or $10 paper bills to your children as a pocket money per day or per week is okay and there is no necessity for a piggy wallet.... But the world will change in few years, and we wont have fiat money anymore in the world...

With bitcoin continuously increasing in value and popularity, an average Joe (irrespective of the fact whether he is interested in cryptos or not) will take money from his bank and put that into cryptos... Ultimately, Joe's friends and neighbors will do the same.  And so on and so forth, everyone will do it - one by one.... Bitcoin is like a magnet and will attract everyone into the ecosystem sooner or later.... Ofcourse, initially people will put part of their money into bitcoin say 5 to 10% of their money into cryptos, but eventually with government regulation kicking in, and so many more things that may happen (say : Merchant adoption) that will make the same Joe increase his % portfolio into cryptos. from a small 5 % to 50% and the cycle will continue... Also, note that the dips in crypto price becomes an opportunity for Joe to increase his holdings into cryptos, so that will make him invest more money (p.s. fiat money) into cryptos every time the market goes down - ultimately making him go cashless and all into digital money / virtual currencies.. 

Whenever the world goes fiat, traditional piggy wallet for kids will loose a market and will eventually need an alternative... Pigzbe can be a good alternative ! Pigzbe can be the best alternative that time.... or let me say - " Pigzbe can be the only alternative that time "