Enjoying old age

I once was young
But now I'm old.
Silver I was
But now I'm gold.

I knew it all
I'd not be told
So confident
Yet now I fold.

A man of ice
Now not so cold.
I grabbed it all,
I've lost my hold.

Once up for sale
By now I'm sold.
Such a shy one
Now oh so bold.

Predictable,
I broke the mould.
Things are better
I think, all told.