It’s been a tumultuous week for bitcoin. After dropping 20 percent in value last week, the digital currency topped $12,000 on Tuesday, reached $15,000 by early on Wednesday and, on Thursday, rocketed above $19,000 before falling and settling around $16,000 in the early afternoon.

Financial experts seem to agree: It’s volatile. CNBC’s Jim Cramer and self-made millionaire Tony Robbins both compared investing in it to gambling in Vegas. Billionaire Mark Cuban said buying the currency would be like “throwing a Hail Mary.”