I advise you to be careful if you want to invest in Manta because this coin has experienced a very severe decline, so are very worried that Manta will sink. If you have the determination to invest in Manta, it's best to stop and look for another coin. I recommend that SOL is good to invest in now because this project has experienced great development,
Well am certain the Op already knows the risks involved in investing on Manta, I would have advice otherwise if it was other coin but since it's an altcoins I don't know much about, I think it's probably best to make your serious assessment and research before diving into something that can dip all through without even growing up again. For some other coins this type of decline would have meant that you have given a good opportunity to buy and HODL it but not all altcoins are like that.