I don't know what you mean by significant problem. But the market is a bet on future global growth. If you can buy and hold (e.g. hold for 20-30 years in a reti

I don't know what you mean by significant problem. But the market is a bet on future global growth. If you can buy and hold (e.g. hold for 20-30 years in a retirement account) then I personally wouldn't worry. I'm still putting as much as I can in to my retirement which is 98% stock and 2% bonds (I'm in my early 30s).