I think some will hold on to btc for those who have invested in btc last years, because they see altcoins as less worthy. But eventually they will see that NLG is just the right thing for the Dutch and newcomers will adapt NLG more easy than btc.
That last makes the difference.

I think a few more months and NLG becomes the btc (read most used coin) in the Netherlands.

BTC is for savings, NLG for spending and saving.

Better NLG here in the Netherlands with this one (or both)  :