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.
Why wouldn't you trust a place that has been around for years, I am not talking about for a specific one, not blockchain.com not any other place, I do not care about the name, think of a made up one that doesn't exist right now, we start a new business next month, we are in 10% APY business, even 100% APY business, and we start to give people that thanks to our business model (whatever that is) and for 10 years we manage to do it without a problem, we keep doing that for as long as possible and people are very happy with us.
Would you still not trust it? It has been doing that 100% yearly return per year for 10 years now and not a single person accused them of scamming, and everybody would vouch for it, I am sure you would at least consider it? Of course this is just an example and there hasn't been any 10 year company in crypto but I just wanted to show I think it is about specifically one company and not all companies in general.