I have question about interest.

If I buy 500,000 FUN tokens, I can see the 1th Month interest is 17.5%

So, If I correctly understand, this is the interest for my main BTC balance, not my FUN tokens?

I already earn 4.08% interest for BTC, so total interest will be 17.5 + 4.08% = 21.58%
Or only 17.5%?

Thanks.