Well there is no minimum investment in crypto currency, you can start investment with u r low budget, don't regret u r self do you know one story, when bitcoin launched newly that time bitcoin prices few cents,that time one guy spent his 10k bitcoin to buy a pizza, imagine now a time how that guy feeling his stupidness, don't worry still we have so many good coins to invest in future those coin gives 10x 100x profit, but one think remember investment in crypto always a risk factor, so before investment in cryto do u r own research.