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Cryptocurrency ETFs  proved too risky for ETF Managers Group Founder and  CEO Sam Masucci   but  he  threw caution to the wind with  his  latest marijuana ETF â and it's paying off.
"The business is growing  the companies entering it are growing "  Masucci  said on CNBC's "Fast Money."
ETF Managers Group in late December launched Alternative Harvest ETF  which tracks around 30 domestic and international stocks that may benefit from the growing marijuana industry. The ETF started with $5 million in assets under management and has grown to around $400 million in just under a month   Masucci  said.
Since Attorney General Jeff Sessions rescinded the Cole Memo  sending pot stocks tumbling  there is reason to be concerned when dealing big money in marijuana. But  Masucci  has accepted a degree of volatility  something  he  wasn't willing to do with cryptocurrency.
"We can't explain the volatility within bitcoin. Until we are comfortable with it and we know how to trade it  we don't see ourselves getting involved "  he  said.
A majority of Alternative Harvest's companies are based in Canada or other countries  where legalization is impending or where regulations are more lax. As far as domestic companies go   Masucci  said ETF Managers Group was careful to pick those best suited to benefit from the cannabis boom  like hydroponics company Scott's Miracle Gro or cigarette manufacturer Philip Morris.
"We will continue to participate in those companies that are largest  and right now  the largest piece is outside of the U.S.  " Masucci  said.
Despite Sessions' actions   Masucci  has high hopes that the U.S. cannabis industry will stick around.
"Twenty-eight states now have approved medical marijuana  16 more have it on the docket for this year  " Masucci  said.
Marijuana ETF manager Sam Masucci interview on Fast Money

Sen. Dianne Feinstein  is the favorite among voters over a Democratic challenger in a Public Policy Institute of California poll  Politico reported.
 Feinstein   84  is running for a fifth term as U.S. senator. Two-thirds of likely voters said they had not heard of de LeÃ³n or did not know enough about him to have an opinion  according to the poll.
 Feinstein  won out over de LeÃ³n among Democrats  independent voters  men  women  and people of all racial and ethnic groups  Politico reported.
In California  the top two vote-getters in a June primary will compete in the November primary  no matter their party affiliation. No prominent Republican has announced a run for  Feinstein 's position  Politico noted.
Poll: Sen. Dianne Feinstein Leading in Primary

Lawrence Argent  stands under  "I See What You Mean"  a 40 foot tall sculpture of a blue bear that peers into the east windows of the Colorado Convention Center. (RJ SANGOSTI/THE DENVER POST)
 Lawrence Argent   a sculptor whose monumental  brightly colored works â including a 40-foot bear of lapis lazuli blue  perched on  its  hind legs and peering inside the Denver convention center â brought a sense of lighthearted wonder to public spaces on two continents  died Oct. 4 at a hospital in Denver.  He  was 60.
 Mr. Argent   a onetime medical student in Australia who went on to lead the sculpture program at the University of Denver  spent more than three decades creating playful photographs  sculptures and art installations  often featuring found objects and what  Mr. Argent  called âan edge of humor.â
Hanging two blood-red street sweeper brushes together   he  formed a testicular work  he  titled âCojonesâ (1999). Pairs of antique womenâs gloves  framed side by side in polyester resin  created a âLibrary of Applauseâ (1994)  and the birth of his sons inspired a series of abstract  250-pound bronze and marble sculptures in the shape of pacifiers.
 Mr. Argent  became best known as a whimsical artist of the public realm beginning with âI See What You Mean â erected just outside the Colorado Convention Center in 2005. Commonly known as âthe big blue bear â the work has become an emblem of hip  21st-century Denver  though its construction initially led some friends to ask whether  Mr. Argent  was now working for Disney.
âLeap â a glass and aluminum sculpture of a rabbit that  Mr. Argent  completed at the Sacramento International Airport in 2011. (Rich Pedroncelli/AP)

Lawrence Argent sculptor who brought whimsy into public view dies at 60