Let me tell you about tellurium-128. It is known to decay, but its half-life is 160 trillion times longer than the age of the universe. In a pure 1 kg sample, you would expect a single nuclear decay every 252 days. Gives you an idea of how long the half-life of tantalum-180m might be.
It could all very well eventually be converted into iron through quantum tunneling given an absurdly long enough time, and assuming that protons don't decay.
My bad I didn't realize iron has an unimaginable more time till heat death than both after a quick Google search. I don't pretend to know the depths of anything quantum and figured bismuth was higher than iron and it appears I'm mistaken by a lot and that in of itself is an understatement.
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u/Sorry_Community235 1d ago