<prompt> Human: Managed to save this much after some time. This sum would be just for investing, not all my savings and I dont want to leave them stagnant in a savings account.Is buying stocks a good choice? For example: after seeing CES 2018 storage solutions like Toshibas looked very promising. Or even a smaller company which is implementing smaller, faster storage or batteries.How could I invest this savings?  <response>: Relevant wiki entries:I have X, what do I do with it?General Information about Investing---Youre not going to be able to really invest in start-ups or new technology with only 4,000. Research and development at that level requires millions, if not orders of magnitude more. The good news is that there are investments out there that let you invest in nearly everything; a good broad stock market index fund like Vanguards Total Stock Market Index Fund, Fidelitys Total Stock Market Index Fund, or Charles Schwabs US Broad Market ETF will have investments in 2000-4000 different US companies, ranging from large to small.Paired with appropriate amounts in international stock market index funds and some amount of bonds, you can make yourself a competent portfolio with only three funds, or fewer if you invest in an all-in-one fund like Vanguards Target Retirement LifeStrategy Funds, Fidelitys Freedom Index Four-In-One Index Fund, or Schwabs Target Index series funds.Now, if you invest this money in a standard taxable brokerage account, you can withdraw the money at any time, but then youll have to worry about taxes both while youre invested and once you cash out. There are tax-advantaged accounts available for US savers that are designed for retirement savings: one is the 401K which allows you to save 18,500 per year but must be sponsored by an employer for their employees, and the IRA which is available to nearly everyone assuming you fall within minimummaximum income limits as necessary; these accounts let you avoid some taxes, but restrict withdrawals to help encourage you to keep the money invested until youre retired.And dont worry about crypto suggestions; Im not aware of any regular rpersonalfinance contributors who would suggest that cryptocurrencies are a serious investment. 