Personally, I seldom trade on a bear market, I consider myself still fairly novice on the world of trading, so I might find it difficult to short or day trade. The best approach for me is to just buy in dip and then hold. But for more seasoned traders around, I would assume that it doesn't matter what market we have, whether it's bull/bear. Those guys really know to play in this market, and make profits day in day out.
Bear market is the right time to buy , all of the coins are experiencing a down time of inflation, we need to stay and hold the coins that we want if we are not having money to buy more since its bear market, but as what I can see it is a bull market approaching for bitcoin holders, bitcoins shows a high 15% in past 3months, it really indicates that halving is fast approaching so better to hold as much as you can now.
But specifically taking in terms of newbies, I would suggest to wait for the bullish trend to arrive in order to start their trading. New traders can hardly make profits in the bearish trend and also I have went through a lot of new traders who made a mistake of buying at peak in the bull runs of mid 2017 and are regretting as the price for bitcoins has not even crossed $10000 from that time.
This is what you should avoid. Never buy at the peak expecting that the price would pump more. Try to study some graphs by applying some indicators which would give you a rough idea about which exactly is the peak and dip.
But I really don't recommend that as well, newbies or beginner trader need to manage their money, they are starting, if they don't have any money but they want to hold their coins because it is bear market, they would be hungry, they need to sell at least half of it so that they can have a money to support their daily needs as well.