Yes.  The question is when to take profit though.  I figure as long as you have only invested what you can afford to lose 100% of, the risk is fairly low keeping it in there, especially with so much potential gains in the future.  We have had to sell some coins during the past couple of months.  We really wanted to keep them in there for at least a year because long-term capital gains are a little less brutal when doing taxes, but things come up.  But it is wise to have a plan for sure.