to get a EB5 you need to declare your bringing in $1m+ of fiat. it doesnt matter the source or the method. your still declaring bringing in $1m+

by declaring it and also at the same time requesting permanent residency you are then making yourself an american resident.

again this is why some just do short term work visa's to avoid declaring income.
most CEO's work with just short stay visa's where you spend 3 months setting up the business. then go on a 3 month vacation in another country and remote manage the business. then 3 months in another country and so on. so your visiting 3-4 countries a year. and then just returning to america for 'day trip' business meetings inbetween.

but anyway. because your not just a hobby investor but a high investor. maybe best you not seek advice from a bitcoin forum but instead go speak to an accountant and migration expert.. im sure you can afford them, if you truly do have the funding to EB5

banks record and report incomes. so doing a trade even on localbitcoin using bank account funds. still get reported.
the only way to avoid it is cash in hand/face to face

your also probably better off finding or setting up local shops and using services to just buy your lifestyle using bitcoin
after all selling btc for fiat to then pay for bread, milk, and other daily needs. is less taxable if you just pay the merchant in btc, because then there is no fiat moving into your bank account.

also most countries dont treat people as a resident of america unless they are there for more that 6-9 months. meaning tax is less of a concern initially(its why most people get short term work visa's and then extend them later)