I can answer your points.I am 27 yrs old web developer.decent pay.not married,financially stable in fiat.if i keep holding bitcoin thoughts do come to my mind will i be multi millionaire in future/the price crash to zero. I am thinking of starting a dice casino in crypto to make passive income but have no idea how much it cost to start such business.
1. Single = no need to worry about anyone else, no children, no dependents.
2. Do you have an emergency fund, or savings, in fiat, other than the BTC?
I used to run a casino, it cost me about 10 BTC at today's prices (it cost more in BTC 3 years ago) ... I'm involved in another one that's about to start, all they really need is a bankroll to fund it as the casino is ready to go. You could try doing that with any other bitcoin casino as well.
You can take a greater risk if you want, just be aware that it's quite possible for you to lose any amount you put in, so maybe not the whole 60 BTC.
On the other hand, do you have fiat reserves, as in very liquid as good as cash? You should have an emergency fund that is worth 3 to 6 months (or more) of your total monthly expenses, so if you suddenly become unemployed for that long, you'll be good.
For example, let's say your monthly expenses including rent, food, groceries, transportation, internet, TV, phone, etc etc. (and you can cut down on some things too, to save money) is about ... $3000. You'll want to set aside 3 to 6 months and that would be = $9000 to $18000. So at today's prices, if you don't have any other cash in your bank account, sell 2 or 3 BTC to get to around $18000. Or a little bit more.
That is your emergency fund, you don't use it for anything, you don't buy a lambo with it, you just keep it in a bank account you can access. Preferably an account with no fees and higher than normal interest rate (I wouldn't really care because they all give 1% to 2% per year interest rates.)
You could also look into stable coins, my preference would be DAI (from Maker) as opposed to all the other ones, followed by USDT simply because they have the largest marketcap of all stablecoins and every exchange on the planet trades them.
That leaves you with about 57 BTC left.
If you want something passive now, in my opinion, the best investment would be a broad market index fund or ETF, depending on what country you live in, these things invest in hundreds or thousands of large cap businesses, like the S&P 500, or if you have access to it, the Vanguard Total Stock Market Funds. You'll get maybe 8% to 12% per year on those. This is a long term investment.
As for others, that depends on how much time you want to study them. There are dividend paying stocks, usually in the banking, energy and oil sectors. There are also REITS, (real estate investment trusts) that pay monthly or quarterly, and you don't have to bother with collecting rent, they do that for you.
If you're willing to take the gamble, cash out some, maybe dollar cost average, and invest in those. Leave some in BTC, put it in cold storage and just HODL it. Donate some to those in need maybe. I'd probably leave at least 10, maybe 20 BTC. I'd create a new wallet using either Bitcoin Core or Electrum, do a couple of tests, then send them to 10 or 20 addresses (1 BTC each, more or less, does not have to be exact.) and make several backups.
If all your other investments do ok, you'll have a decent passive income, plus a nest egg of 10 to 20 BTC, which, in another 5 to 10 years could be worth $100k to $1m each, and at that point you have a nice problem what to do with it. (I'd cash out some of it to add to my emergency fund and other traditional fiat investments.)
Find out what you really need right now, save the rest, invest smartly.
