Market is witnessing some gradual dumps and it's a know fact that altcoins will bleed more than bitcoin and they will be stable or recover only when bitcoin recovers and pumps. So will it be wise to hold on to Altcoin or switch to Bitcoin or convert the funds into stablecoins and wait for market to either start recovering or to dump further to buy more in order to reach breakthrough for the lose which we might have incurred till now.
In theory it would definitely make sense to transfer your funds from highly volatile altcoins into Bitcoin or even better in stablecoins like USDT or USDC before a bear market comes. By doing that you have saved your profits (when you transferred it to stable coins) or you increased your Bitcoin holdings and once the market hit's a low you can use that money again to buy back for example 3 times the amount of those tokens that you sold before.
The BIG problem is though that you would need to know how the market develops in the future (which is basically true for every investment) in order for that strategy to work perfectly. It is also possible that you sell your altcoins only one day before they make a x2 or something.