600Kcrypto - I'm roughly 15 years older than you - 40. The time is going to rush by for you - 26 today - 45 tomorrow.
I make my living as a vulture investor -always looking for what is underpriced and cheap. But also I only buy things which produce flows of cash through time. Cryptocurrency by definition is not an investment - it is a speculation (a bet on the future price of an asset). A key point to remember is that if you overpay a little for an investment you will most likely still make money in the long run because it produces cash every day/quarter/year. Reinvested cash, over and over - will make you insanely rich over the years.
I buy stocks, commercial real estate (apartment complexes, mobile home parks) - and now for some diversification I am looking at putting maybe 1-2% of my portfolio in a small crypto mine (I have a commercial building sitting on land I own with great electricity prices in a cold climate). But I would never gamble my entire net worth on any one asset - once you are rich (and you are at the beginning stages of being rich) it is not worth it.
$600K is a sum large enough to almost guarantee you will become truly rich over the years - and it is a sum you may have a very hard time saving up if you don't take steps to protect it NOW. Time is your friend - make 10-15% per year from now on out on that nest egg and you will be stupid rich while you are still young enough to enjoy it.
You have done an amazing thing - accumulated a significant nest egg at a young age. My best advice to you would be to take your money off the table at this point. Find a nice mix of value stocks - or if you want something more active that can yield higher returns over time - get into commercial real estate. Find some underpriced small apartment complex or mobile home park around $1M in value, buy it with your $600K and then rapidly pay off the debt (should be 5 years if you buy correctly).
When the debt is paid you should have yourself a multiunit building or trailer park of 50 lots or more which gives you a cash flow of greater than $100,000 USD per year for the REST OF YOUR GODDAMN LIFE.
And you will be only 31 years old my friend.
The beauty is you can go back to school maybe - or just keep working - in the mean time your money works for you. You will be 31 - prime of your life young man. You'll have a full time income from your job PLUS $100,000 per YEAR to REINVEST in a wide variety of cash producing assets - more apartments with higher leverage ('cause it's your second deal you can borrow more), value stocks, etc.
You'll easily have $10M in today's money by age 50 - maybe 40 if you really hustle.
But get your money out of crypto - you are WAYYYYYYYY too concentrated in an extremely speculative asset class.
Get back in after a crash. Or at least reduce it to 10% or less of your holdings. Buy some mining gear at good prices if you like so you're actually producing the asset not just purchasing and speculating.
With this plan you are almost guaranteed to become very very rich in life. If you stay in crypto at this point you are gambling with your money. You have a $600K nest egg - a GIGANTIC head start in the wealth game. Use it wisely.
Also more advice:
-STOP TALKING RIGHT NOW ABOUT YOUR GODDAMN WEALTH TO YOUR FRIENDS. NO GOOD CAN COME OF THAT.
-Get educated - if you do not yet understand and are educated about modern portfolio theory and behavioral finance, economics and statistics - make it your biz to learn. For the record I don't believe MPT holds water but you need to know it because it underpins almost all financial advice given by pros (again I think they're wrong - I'm a value fan of Ben Graham and W Buffett). You MUST understand discounted cash flows, time value of money, net present value, internal rate of return and other core finance topics because they are the foundation of all wealth building and investment analysis - take a course at your local jr. college if you have to
Best of luck - remember the #1 rule of investing is DON'T LOSE MONEY.
The #2 rule is - SEE RULE 1.