<prompt> Human: I am in my early 40s and have about 150k in a company-matched 401k plan. Current allocation is growth oriented: only 12 in bonds and fixed income funds; the rest in stocks. On the one hand, this is the right mix for my age bracket. On the other hand, were 9 years into this bull market. Is this a good time to take some profit and transition into a less aggressive allocation? Or when it comes to retirement funds, should I not try to time the market at all.  <response>: I know I shouldnt try to time the market, but I think its going to go down from here.What if youre wrong? 