I found your post very interesting until when I checked
https://nimblenode.io/product/Bitcoin I mean your store in particular where i thought that I can store btc, bithereum and ethereum in one device but I was wrong, I feel your product though good shall be better and compete with other similar products if most coins supported can be accommodated by one device.
Thank you for your interest! It is certainly our goal to be able to have one device run multiple nodes of different chains, doubling the nimbleNODE as a multi-coin hardware wallet that doesn't require trusting a third-party, only your nodes directly.
We will certainly be adding this feature to future iterations of nimbleNODE devices, so stay in the nimbleNODE loop to find out when this is available!