Hey Ed,
What is the time horizon of the investor ?
If 71, then is it worth it, to gamble with something, that has no fundamentals & is mostly used for shady transactions and nothing else ?
(BTC)
(yes, it's being actively traded, but by those who know what they do, more or less)
$10 k into gold ?
Just to put it in & forget ?
Then, if that $10k is no more than 5% / 10% of your total portfolio, avarage in, $500 per month ;
thing is i an minor downtrend at the moment, but overall should go for those 2010 highs of $2000.
All of this is just an opinion, by someone who has no emotional attachment for any of those two.
Still, what i would do at your age, and no specific knowladge (sorry if you have the skills, but confusing then, why would you ask in the first place,), avarage in to SnP500/VOO, yet stay liquid, on cash, with 50% , next crash begins, 30% ~ 40% , go all in hard on equities.
P.s
I wouldn't use leverage, because i don't want to give away, the privilege of deciding, when to stop.