The major US asset manager Fidelity will offer workers the opportunity to have a portion of their retirement savings allocated to Bitcoin. The news could allow millions of Americans to invest directly in the cryptocurrency, in turn promoting its uptake. Starting this summer, the US asset manager Fidelity wants to offer an option allowing savers to invest part of their retirement capital in the Bitcoin cryptocurrency. As such, savers will be able to allocate a certain percentage of their retirement plan contributions to a Bitcoin account. The upper limit will be determined by employers, bearing…