SHOULD I INVEST IN MUTUAL FUNDS OR STOCKS IN A ROTH IRA ?

I am contributing to 401k as well as maxing it out as partial of my employer’s early retirement plan. The income in the 401k is removing invested in Mutual funds. I additionally devise to open the Roth IRA as well as would similar to to put $5000 (max amount). I have thirty some-more years to retire. At this point, is it receptive to advice for me to deposit the volume in the Roth IRA in mutual supports or in bonds ?