2000 BTC is roughly equivalent to around 134 million bucks which is why I would prefer the best option available even if meant spending a million bucks to successfully store the remaining 133 million bucks.
If nuclear sheltered vaults are the best option, I would obviously store all my BTC though I would research them thoroughly beforehand.
But the issue is the centralization aspect of it, would you trust your bank with 134 millions dollars? If the answer is no then what makes that service deserving of that kind of trust? To me it seems like the first place any government hungry for funds will go to try to steal anything that is valuable there.
As such it is better to find a way to store those coins securely by ourselves, I am not saying that is not a pain and a difficult task but that is the kind of problem everyone would wish to have.