An errant dropping of a lease clause has cost the US govt $7B to date in royalties from oil companies drilling in the gulf of mexico. Many of those leases run up to 85 years from the date of issue...
Be fearful when others are greedy, and greedy when others are fearful. Just another form of "buy low, sell high" for those who have trouble with things. This rule is not universal. Do not buy a 1973 Pinto because everyone else is afraid of it.