Go long on stocks, sure - but as a financial strategy taking profits at the highs and putting into bonds or guaranteed interest can be the way to go for less riskier plays - especially for short terms.
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Won’t bonds get crushed by rising rates?
You can get bonds that will be competitive with interest rates (or linked to the prime rate).
The main problem with bonds is that it ties up your cash for awhile.
You’ll also generally make less than you could have in the stock market - but you won’t necessarily lose anything either (unless you get into junk bonds and the companies/governments that issue them fail)