You are in perfect place and already many have replies that buy bitcoin. My suggestion will be also that if you are gonna invest in this situation of cryptocurrencies market then bitcoin is the best solution for you. You can invest in it without any worries it will  gives you the best security. And I also advised you that refrain from investing in alt-coin in this situation. At present it is very risky to invest in alt-coins. But investing in top alt-coins like BNB, Ethereum will not be bad. But in my opinion Bitcoin will be the best for investment.