Shifting coins between alt and btc on an exchange can give you nice results 
It can but its very risky, there are many methods available, that you can do.
Like trading/gambling/ or just invest and waiting on the right moment to make profit.
What's the different of risk in shifting coins that one stated above and to those method you stated?
Both of them are risky. I thought you will suggest a non risky method.
Well the one posted above is likely similar in doing exchange trading. Another form of gambling aside from usual gambling type in the Gambling section. Yes risk are there in this method, but it can really give you a nice and kicking profit if the executions are made properly.
Regrets are part of that method so it's normal.