Bitcoin roundup: Howard Marks warms, ECB's Lagarde not a fan, new ETF filing

"[Bitcoin] will be shown not to have any substance," wrote Oaktree Capital (OAK) legend Howard Marks in 2018. He's changed his tune a bit of late, noting in his most recent letter that his son Andrew "thankfully owns a meaningful amount for our family." While not headed down the "proverbial rabbit hole" of crypto (yet), Marks (Howard) is "striving to learn."Meanwhile, Christine Lagarde says bitcoin (BTC-USD) is a "speculative asset" that has facilitated "funny business ... reprehensible activity," and thus must be regulated. Lagarde knows of what she speaks, having been convicted in a court of law of engaging in "funny business" while French finance minister in 2008. She was punished by being elevated to IMF head, and then to her current position atop the ECB.Meanwhile, Canada's Arxnovum Investments has filed in that country for the Arxnovum Bitcoin ETF. Involved as sub-custodian is the Winklevoss-owned Gemini Trust.As for prices, bitcoin dipped a bit