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Nano (NANO / USD)
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Kuhusu Nano
Nano is a cryptocurrency characterized by a directed acyclic graph data structure and distributed ledger, making it possible for Nano to work without intermediaries. To agree on what transactions to commit, it uses a voting system with weight based on the amount of currency an account holds.
Nano was launched in October 2015 by Colin LeMahieu to address the Bitcoin scalability problem and was created to reduce confirmation times and fees. The currency implements no-fee transactions and achieves confirmation in under one second. WikipediaKuhusu Dola ya Marekani
Dolar ya Marekani ni pesa halali ya Marekani. Alama yake ni $.
Dolar ya Marekani inapatikana kwa noti za dola 1, 2, 5, 10, 20, 50 na 100. Kuna pia sarafu ya dola 1.
Dolar moja ina senti 100. Senti huitwa pia "penny" nchini Marekani. Kuna sarafu za nusu dolar, robo dolar na sarafu za senti 10, 5 na 1.
Hadi mwaka 1969 noti ya dolar ya Marekani ilikuwa na ahadi ya kwamba serikali ya Marekani itampatia kila mtu dhahabu kulingana na thamani ya dola hizi akipenda kuzibadilisha.
Usawa huu na thamani ya dhahabu ulifutwa. Leo hii dolar ya Marekani ni pesa ya kuiamini serikali kama pesa zote. Maana yake watumiaji husadiki ya kwamba serikali haitachapisha dola kushinda uwezo wa uchumi na thamani ya bidhaa zilizopo nchini Tanzania.
Tangu mwisho wa Vita Kuu ya Pili ya Dunia dolar ya Marekani imekuwa pesa kuu duniani na sehemu kubwa ya biashara ya kimataifa hukadiriwa kwa dolar hizo. Lakini tangu kupatikana kwa Euro mwaka 1999 umuhimu wa dolar ya Marekani imeanza kupungua polepole. Hata hivyo nchi mbalimbali zimeachana na sarafu zao na kuamua kutumia dolar ya Marekani tu, k.mf. El Salvador. Wikipedia