Is this legal?

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I gamble online at an online casino. I play for cash, of course. I recently won over $70,000 over the course of three months. I transfered the funds in my checking account and suprizingly it showed up the next day. A few days ago i learned through a mutual friend that gambling online was illegal in the United States. Is it illegal. Should i keep this money, if not, what should i do with it? If yes, do i have to place it as part of my earning in a tax report. And should i be help liable for the money if it was the casino who accepted a US player when they knew i shuldn't be playing? I devieced a plan in which i always win. if i get the okay, i will continue and earn hundreds of thousands a year. Please consult with lawyers, legal personell e.t.c so i know i am doing something legal. I don't like jail, trust me!