Index funds are not risk free! We have had a solid 15 years and everyone forgot that there are decades of declines or stagnation.
Not saying it's necessarily the ideal vehicle but anything beats the banks.
while you’re at it maybe pick up some Indian bonds which have a high coupon close to 8%?
The modern version is to go hard into equities and out-grow the drawdown risks. You still want a couple years of burn in treasuries but that is strictly a buffer against adverse returns. By the time you retire, the treasury fraction is a tiny fraction of the total by virtue of the equity growth rate.
The sibling comment addresses bond funds.
ZIRP, 2008, Covid, trump, big tech, and AI all came after Boyle.