You are forgetting few things:

1. Traditional bank CDs are paid in USD (or some other fiat) which is much more stable than some token.
2. While the money you put into CDs is locked for you, banks will use it to lend it to others (or lend a lot more using the fractional reserve system), so they will make money to pay your interests.
3. They offer interest rates usually under 2%. Not 40%.

But if you lock HEX or WISE, no one is investing this money to earn any profit. So where does the interest come from?