You cannot roll over the 401k till you leave or retire, or die.
BUT, you can stop investing when the yearly time comes around to stop or add to funds.
So if you want something different, complain to them to offer more, that may get you some other investments to look at through the 401k.
When you stop investing you can start up a Roth - Ira.
OR if you start a business, you can start a Solo Roth and invest your earnings there.
FACT!!
You can withdraw any monies you want from IRA accounts at ANY age with NO penalties, IF (big IF), you use the IRS actuarial tables for your lifespan and take equal withdrawals. You can be 25, 35,45, 55 and do this, but of course the IRS gets its share of
taxes , but there will be no penalties on the withdrawal!
ie, if you have $50,000 in an IRA and you are age 49, you can goto the IRS tables and get the $50,000 in equal monthly payments (minus the taxes!) based on your life expectancy.
http://www.montana.edu/wwwpb/pubs/mt9808.html
"Equal Payments Based on Life Expectancy. An eighth exception rule exists for substantially equal withdrawals from an "ordinary" IRA based on life expectancy. The IRS allows a person to receive distributions from an ordinary IRA before age 59 1/2 without the 10% excise tax if the withdrawals are part of a series of substantially equal payments over the person's life (based on life expectancy tables) or over the lives of the person and the beneficiary (joint life expectancies). An IRS-approved distribution method must be used and the person must take at least one distribution annually for this exception to apply."