When things started I personally lent 2000 BTC to Alberto, both because I believed he was legitimate and because noblesse oblige. When things exploded, I lent him 2000 BTC more without any expectation of ROI, merely because I thought it would aid in resolving the process (and still believing I would eventually get them back). I am still spending my money and time for the chance (however slim) for a positive resolution.
I cant verify your claims, they may or may not be true. Even if true they didnt benefit investors, and I dont see how arguing that you honestly thought this was a legitimate venture and trying to prove that by claiming you poured even more money in to a bottomless pit, absolves you from your legal responsibilities. If my accountant screws up and it ends up costing me a lot of money, I may or may not believe it to be an honest mistake, but I might still want to claim or sue him for damages. Its up to your investors to decide if they want to act on this, or if they want to believe that you too were duped and thats good enough to give you a free pass. Like I said, I have no opinion either way (though the authorities might have one should it come to that).
If that's not taking my responsibility seriously, I don't know what is.
First of all, just googling Alberto's name brings up more than just "unsuccessful ventures". They were clearly scams (and even a drug bust). Did you feel a need to mention that? No; instead you trivialized it and did
vouch for him, and his ability to pay back; I dont see what else you can call statements like " I talked with Alberto about many things and I am confident he is committed to making bitdaytrade work, and even if it fails, to pay back every last satoshi of debt, bringing to the table his personal assets if necessary (of which he has enough to cover his obligations). "
Moreover, you called your self the "IPO manager", but did you ever tell Alberto, let alone anyone else, its illegal in most countries to sell such unregistered securities to unsophisticated investors? Did you even bother to look in to it? If you had taken your responsibility seriously, you would have understood your (and your customer's !) liability when soliciting investments and if you had any sense, you would never have accepted the "job".