Nano is faster!
Bitcoin is slower.

Nano has no fees, you send 1 Nano you get 1 Nano!
Bitcoin has massive fees, you send 0.01 Bitcoin you get 0.0097 Bitcoin.

Nano has superior tech!
Bitcoin is outdated.

Nano is the future!
Bitcoin is the past.

Why aren't you holding any nano?
So you can live with your Nano no need to to buy any more Bitcoins.

If you think you are still need to buy Bitcoin to ensure the security of your funds in future then this can be the answer for your own question no need to convince anyone here anymore.