Top paid Euro league player starts at $3.4 million per year and there is no way Biggie would make near that going there. Even if he gets drafted in the second round, he is going to make similar or better money than he would overseas.
Top Euroleague Salaries
No matter what Biggie does, he won't be a top 10 pick...it just isn't going to happen as he is more slight improvements rather than projection of major jumps of ability (OG Anunoby for example). He could, with continued improvement and another stellar year, work his way in to the mid second round and potentially as a fringe 15 pick. Getting that high and with his backstory...Nike may sign him to a shoe contract. That would be considerably more money than a mid-second round pick or making money in Europe.
Also, your posts are just rambles of jumbled thoughts and run on sentences thus making it very hard to read. I highly doubt that Biggie's draft stock suffered because of a single game where he played to his season averages in points, rebounds, and TO's. Had he gone scoreless, had less than 6 boards, and had 5 TO's...you may be right. But Biggie played to what he had all season long in that game. He has also been on the radar of NBA teams since he was young because of his time in USA Basketball and as an McDonald's AA. Scouts aren't going to have their minds changed on a single game against a superior opponent on a single night. Again, he performed to what was expected of him from his season averages.