By Brian O’Connell These were some of the key stories in the crypto markets this week. The S&P Cryptocurrency Broad Digital Market Index (SPCBDM) ended the week at 3,925.70. It’s down 5.6% for the month of April, and 13% on a year-to-date basis. Even so, investors are striking a positive tone about the cryptocurrencies going forward. “Last week, a new poll from Quinnipiac University showed that Americans below 50 are increasingly “bullish” about cryptocurrencies,” TheStreet Crypto’s Sabrina Toppa noted this week. The survey is loaded with data, most of it signifying a “thumb’s up” for the sect…