There is always something to lose when investing, lending your coins for interest will always be risky and the ones who put their feet to risk are always the ones going to take profit when things are going good but they are also the ones losing more when things got ugly. The only safer option if you want to make money without taking a high risk is POS.
Lending is always not risky if the site is trustworthy. It is not the fact how the valuation is. Because at the same time they are borrower and lender in maximum case. For example: blockchain.com is a lender and borrower. When anyone take loan from them the lender should have to provide collateral.
I dont consider any platform to be trustworthy no matter how many years that they had been existing because they can really ran off those funds anytime.
I dont really have any much confidence with that but there are platforms out there that do give out such interest opportunity to those who do tend to lend.
Also, does 3 to 4% APY sounds interesting? no its not.