sure it can!
say you were a starving child in calcutta and angelina jolie adopted you... you'd be pretty stoked once you got over being half dead (:
or think about how great it feels when you've bought your mom something she's always wanted, or if you could finally afford to go on a honeymoon with your prince charming.
but if you're talking about constantly being in a state of high energy and optimism, CONSTANTLY being in that state, then no. it buys happiness with expiry dates. just the way life goes.