Safest investment for this is with Bitcoin since the whole market depends on BTC and if the bear is down, you can see the price of BTC will slowly go up and after a year most probably new ATH will be made so have patience with BTC and you can be good. The next best investment during bear market is the top altcoins, again they can rise higher and with BTC on a good position, I’m confident that good altcoins will follow that good trend, the next bull market will surely be a good one.