Blackwell&#x27;s growth calculator can be fun to play with and perhaps provides insight into the advantages of investing in unsafe fast growing companies (aka &quot;startups&quot; as used in Silicon Valley). Note that the growth rate defaults to weekly.<p><a href="http:&#x2F;&#x2F;growth.tlb.org&#x2F;#" rel="nofollow">http:&#x2F;&#x2F;growth.tlb.org&#x2F;#</a>