The tricky bit is finding new stocks now that will perform as well as your 2010 stocks have.
Keep looking at diversification and pick some new stocks on dull days.
As they say run your profits and cut your losses.
Or, Sell and regret but sell.
Any adage that suggests buyibg or selling stocks was probably invented by stockbrokers trying to earn commission!
Many years ago I had a friend that bought stock in a relatively new retailer that no one outside of NW Arkansas had ever heard of. He bought $500. worth. It tripled in value. He sold the stock and bought a trailer.
That stock was Wal-Mart. That was his "million dollar" trailer.
Most companies, like people, have a life cycle. Meaning they die. Ever heard of Pan Am, Enron, Sears, Kodak, Polaroid, Washington Mutual? dead or dying. Sell before the autopsy.
You never lose money by taking a profit.
Lots of people have lost money waiting for a further price rise, only to discover the price plummets for some reason.
Sell when it no longer fits the reasons you bought it in the first place (i.e. P/E value, change in leadership, market for product has changed). Is there an investment that better fits your personal strategy today? 1,600% gain on Priceline. Nobody should have regrets over that!
You must know the market, do some research.
If you bought just about any stock around 2010 or so, it's probably done pretty well for you. I have several stocks up over 100% since I bought them. So the question becomes: when do I take my winnings and leave the table? I'm worried about the bubble bursting, but I've also heard a few horror stories about getting out too soon (a good friend of mine bought Priceline at $3/share, sold it when it was at $50..it's now at 1,234).
So how can you tell what the ceiling is for any given stock? How do you know if it's gone up as high as it can go?