Avast won’t respond directly to you - but should investigate the site within 48 hours.
If they find it to be a false positive it will be removed from the database. If after that time period it is still detected they must still consider it suspect.
Whilst there is still only one at virus total - I have run some other scans.
Some security related pointers give here - Website test: math-bitcoin-predictions.com
Whilst considered a Low Security Risk here - Website test: math-bitcoin-predictions.com there are other Hardening Improvements given.
Considered a Minimal Security Risk here - Quttera - Detailed Malware Scan Report - there are a lot of external 3rd party links which could impact the site.
These may or may not have an impact in the Avast Detection. Since you don’t give a screenshot of the Avast Alert window with the Details option shown it is hard to pint down the cause.
So I paid it a visit - see attached image.
Note I don’t work for avast, but a long term Avast user.
