Cash is not the safest..all cash does is guarantee you that you'll lose a small amount.
By all means go ahead and cash all your investments out as the markets climb the wall of worry. In cash you'll get at best 2%..more likely around 1.5% which is well below inflation in most countries, therefore you lock in the difference between the two as a loss. Sure you won't take a large loss, but you aren't going to make anything either, just get steadily and slowly poorer.
If you want to retire one day then keep your investment management fees as low as possible and diversify across several markets, preferably in low cost ETF's that get rebalanced once a year or so. The rest of the time go drink Corona's on the beach and don't worry bout it. Oh and don't give anyone in Dubai your money to manage, especially if it involves real estate.