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Individual Investor Safe Reinvest Gains Strategy?
Your idea is a good one, but, as usual, the devil is in the details, and implementation might not be as easy as you think.  The comments on the question have pointed out your Steps 2 and 4 are  not necessarily the best way of doing things, and that perhaps  keeping the principal  amount invested in the same fund instead of taking it all out and re-investing it in a similar, but different, fund might be better. The other points for you to consider are as follows. How do you identify which of the thousands of conventional mutual  funds and ETFs is the average-risk / high-gain mutual fund into which you will place your initial investment?  Broadly speaking, most actively managed mutual fund with average risk are likely to give you  less-than-average gains over long periods of time.  The  unfortunate truth, to which many pay only Lipper service, is that  X% of actively managed mutual funds  in a specific category failed  to beat the average gain of all funds in that category, or the  corresponding index, e.g. S&P 500 Index for large-stock mutual funds, over the past N years, where X is generally between 70 and  100, and N is 5, 10, 15 etc.  Indeed, one of the arguments in  favor of investing in a very low-cost index fund is that you are effectively guaranteed the average gain (or loss :-(, don't forget the possibility of loss). This, of course, is also the argument used against investing in index funds.  Why invest in boring index funds and settle for average gains (at essentially no risk of not getting the average performance: average performance is close to guaranteed) when you can  get much more out of your investments by investing in a fund that is among the (100-X)% funds that had better than average returns?  The difficulty is that which funds are X-rated and which non-X-rated (i.e. rated G = good or PG = pretty good), is known only in hindsight whereas what you need is foresight. As everyone will tell you, past performance does not guarantee future results.  As someone (John Bogle?) said,  when you invest in a mutual fund, you are in the position of a rower in rowboat: you can see where you have been but not where you are going.  In summary, implementation of your strategy needs a good crystal ball to look into the future. There is no such things as a guaranteed bond fund. They also have risks though not necessarily the same as in a stock mutual fund. You need to have a Plan B in mind in case your chosen mutual fund takes a longer time than expected to return the 10% gain that you want to use to trigger profit-taking and investment of the gain into a low-risk bond fund, and also maybe a Plan C in case the vagaries of the market cause your chosen mutual fund to have negative return for some time. What is the exit strategy?