One of the advantages that a self directed IRA will give you is the chance to diversify the different asset types that you would not usually have when it comes to normal 401k and IRA fund types.
With the other fund types, you do not have all that much freedom to move around and your money would be at the mercy of other people who will invest them as they see fit.
You will not have a lot of oversight and you would not be able to control the amount of moves that you would be able to get the most profit that you can.
Of course, with self directed IRAs you have to still have some oversight and that is where a custodian will come in and they will be able to make sure that your actions will be taken care of.
What is the advantage of having a fund like this? Well, you could adjust as you see fit depending on your risk tolerability.
If you have a bit more risk tolerance, you could go for more aggressive stocks and bonds that is high yield, high risk and when you are a bit older, you could go for investments like self directed IRA real estate which are more long term.
It is your choice entirely and you would really be able to make sure that you would be able to make the decisions that would suit your tolerance to risk and your ability to invest properly.
You would not have a real problem making sure that you would be able to get the right moves that would enable you to get the profit that you want. Just make sure that all of your investments are above board and you will not get in trouble because of them and you will be just fine.
As long as you follow the rules, there should be no prevailing issues.