Yes if i had infinite money i would stay happy forever.
but you might go on a deep spiritual journey where you realise money actually makes things worse, unless you plan on taking cocaine all the time in which case then yes you are correct you would feel great all the time untill you died of a heart attack but you would have great nights watching 80's electro pop on youtube mashed, gl.
surely you would be pretty sad when you died of a heart attack?
If you had infinite money and an ounce of coke sitting on your coffee table you'd actually be having a heart attack in a jacuzzi filled with hot women, and that would be an ok way to go, but yes also kinda sad as well.
It hasn't been stated that this is a fatal heart attack so I'm assuming it's not too bad.
Might smart a bit but then you get to claim on your critical illness cover and get your house paid off and it's all gravy from there on in.
Then again seeing as we now have infinite money that probably won't be such a great consolation.