So the question is, when I park my smallish stash of Bitcoin at BlockFi.com instead of in a wallet on my computer, am I dabbling in DeFi? I'm weighing the risk to my capital against the 6% return (compounding) and for the kind of small sums I'm looking at, it seems like a very good thing to do with an asset I'd just be HODLing anyway.
Interestingly it was an advert in Brave's new tab screen that made me jump, offering a $15 bonus if I leave a few BTC there for a month at least.