To say "There is a tide" is better than saying "Buy (or sell) now and you'll cover expenses for the whole year, but if you fail to act right away, you may regret it the rest of your life."
cover One thousand dollars will cover all the expenses for the party.
cover $100 will cover all your expenses for the trip.
cover I cover twenty miles a day.
cover Ten thousand yen will not cover the expenses.
cover We covered three states in two days.
cover You are covered with a $300 deductible.
cover I have to cover his loss.
cover By tomorrow morning all the world will have been covered with snow.
cover That little house looks just like the little house my grandmother lived in when she was a little girl, on a hill covered with daisies and apple trees growing around.