(Bloomberg) -- MicroStrategy Inc. Chairman Michael Saylor’s strategy of buying Bitcoin may be coming into question as the advent of exchange-traded funds holding the largest cryptocurrency appears imminent. Most Read from BloombergImmigrants Are Leaving Canada at Faster Pace, Study ShowsReal Estate Industry Takes Fresh Hit With Verdict on CommissionsIsrael Latest: Blinken Returning to Israel; Refugee Camp HitSaudi Forces on Alert After Clash With Iran-Backed HouthisSony’s Bungie Game Unit Cut 8%