With already tens of thousands of Bitcoin tied up in DeFi and Bitcoin only just the past few months really becoming a popular collateral for DeFi, and if we say there's only 5-10 million Bitcoin that will touch the market during the run-up of the bull market, it's certainly possible that up to 10% of the available Bitcoin in the market could be tied up in DeFi in the next two years.
Fees are really high with defi and the more funds in it, the more lucrative it bnecomes to hack.
It looks like a lot of currencies are tryihng to roll out defi support so there's likely going to be one produced by someone with no idea what they're doing...
True bitcoin DEFI won't be possible until some sort of cross-chain compatibility occurs or the bitcoin chain is adapted to allow it directly. Also in order to earn interest with defi you have to have people happy to borrow it for that rate (rates have already dropped by half since I put funds in about half a year ago).
And I don't see a problem with companies securing Bitcoin assets. Bitcoin is inherently secure. Bitcoin is only not secure when it needs to be kept online in hot wallets, which is why exchanges have problems. A company putting a few percent of their cash reserves in Bitcoin for the long term would be holding all that off-line with extremely secure access. They won't be giving access to random employees.
Bitcoin isn't like a bank account, you can't just reroute where the funds go if the CEO disapears or something. Giving the CEO and directors acccess to a multisig is a way to go, but every time one leaves - you'll have to generate a new multisig address. You'd also have to put plans in place in case a tragedy hit one of the offices and a large number of workers suffered injuries great enough to make it so shareholders/new management can't access the funds.
Or they'll store it in some institutional custody service where they don't have to worry about it at all. Ability of companies to safely store Bitcoin is not a problem.
Same problem as before but potentially even more of a problem. You can probably expectg terms in that contract to say something along the lines of: "funds held by us may be lent to companies that we consider reputable" like most other places do and then if some funds get lost - what do you do about that? Especially if the company already nullifies its burden.