cash is and will still always be king until people realize what the USD is backed on (gold) they no longer have and refuse to publicly address how much of it they have on hand so as far as im concerned USD is speculative
when people realize the USD will crater and it will take any cash with it that is backed by it. the rouble is the oldest and strongest currency on the planet besides tangible assets like gold, silver. if i was going to put my money in anything it would be the rouble and i did this at the beginning of the invasion of ukraine and made about 22% profit on it since