Professor Launches Cryptocurrency Staking Ponzi While Teaching at Swiss University
A Swiss academic is running a cryptocurrency pyramid scheme out of Zug while maintaining his position as a professor at the Swiss School of Management in Barcelona.
Pan Gross-Ruyken founded PTGR AG in 2021, registering the domain ptgr.ch on June 9th of that year. In 2025—nearly four years later—he registered a second domain, ptgr.io, on January 26th. The .io site promotes what appears to be an MLM cryptocurrency operation. The .ch domain advertises investment consulting services. Click the "$PTGR token" link on the .ch website and you land on the .io domain. Same company. Same founder.
Gross-Ruyken's bio at the Swiss School of Management describes him as "CEO of PTGR AG in Zug, Switzerland" leading "digital finance solutions for private and institutional clients." The biography suggests he's running a legitimate investment advisory. His actual operation tells a different story.
PTGR AG sells PTGR tokens to recruits under the guise of a staking investment. The company doesn't disclose its token prices. Once purchased, members lock their tokens into a staking scheme that promises annual returns based on investment size: a 5,000 to 10,000 token investment yields 1% to 2.5% annually; 250,001 to 500,000 tokens return 5% to 12.5% annually; 500,001 or more tokens supposedly generate 6% to 15% annually.
The money comes from new recruits, not from any actual revenue-generating business. PTGR AG has no retailable products or services. Members make money exclusively by recruiting others into the scheme and earning "multi-level rewards" as their recruits buy tokens and recruit further down the chain.
The structure is textbook Ponzi. PTGR AG buried its compensation plan details on its website, vaguely promising that members "earn rewards each time a direct referral makes a purchase or participates in staking" and "continue earning as your referrals invite others."
What makes this scheme particularly audacious is Gross-Ruyken's position in academia. He holds institutional credibility as a university professor while simultaneously running an operation that lacks basic transparency about token pricing and returns. The dual-domain strategy—one presenting legitimate consulting, the other promoting token staking—suggests deliberate obfuscation.
At publication, PTGR AG's website displays a countdown timer for a PTGR token "main sale," implying urgency to potential recruits. The timing is classic MLM recruitment pressure.
Gross-Ruyken rebranded himself as a crypto entrepreneur around 2021. The PTGR token scheme appears to be his attempt to revive a failed cryptocurrency venture by wrapping it in the legitimacy of academic credentials and a Swiss business address. The playbook is familiar: create artificial scarcity through token sales, promise outsized returns through staking, layer in recruitment commissions, and wait for the inevitable collapse when new money stops flowing in.
For now, Gross-Ruyken maintains both lives—professor and crypto promoter—apparently unconcerned about the obvious legal and ethical conflicts between them.
🤖 Quick Answer
What is PTGR AG and who founded it?PTGR AG is a company registered in Zug, Switzerland, founded by Pan Gross-Ruyken in 2021. The firm operates two domains: ptgr.ch, which advertises investment consulting services, and ptgr.io, registered in January 2025, which promotes a cryptocurrency token and what investigators describe as an MLM-structured staking operation.
Who is Pan Gross-Ruyken?
Pan Gross-Ruyken is a professor at the Swiss School of Management in Barcelona who simultaneously serves as CEO of PTGR AG in Zug, Switzerland. His academic institution biography confirms his dual role leading digital asset ventures while maintaining a teaching position at the business school.
How does the PTGR AG business model operate?
PTGR AG operates through two interconnected domains.
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